How to Clean and Polish Seashells: 12 Steps (with Pictures) (2024)

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1Collecting Seashells

2Removing Tissue from Live Seashells

3Cleaning Dead Seashells

4Polishing Seashells

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Co-authored byPatricia Chukerman

Last Updated: October 25, 2022Approved

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Seashells can be a nice memento of a fondly remembered trip to the beach. They can be used as decorative items around the home or as part of a craft project. If you are collecting seashells from along the beach, it's important to clean the shells on the outside and inside and polish them to preserve them. Get started at step number one below for how.

Things You Should Know

  • Try to pick seashells that no longer have living creatures or animal tissue in them. Boil, bury, or freeze shells to remove any dead tissue before cleaning.
  • Soak seashells in clean water for a week to dissolve debris, then deep clean with bleach or toothpaste. Brush away clinging barnacles afterwards.
  • After cleaning, wait for your shells to dry and then polish them with mineral oil or a satin-finish polyurethane spray.

Part 1

Part 1 of 4:

Collecting Seashells

  1. 1

    Obtain your shells from your favourite collecting spot. This may be a local beach, or one you visit when on vacation.[1] Shells can also be purchased from craft stores and from online sources.

  2. 2

    Do not take any shells with sea creatures alive in them. Be considerate of nature and leave seashells with live creatures in them alone. You can tell a shell is still alive if you turn it over and there is a creature inside it.

    • Check with your country's laws to ensure you don't collect illegal seashells. For example, in U.S. waters, Queen Conches are illegal to take. They are a protected species due it being vulnerable to overfishing.

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  3. 3

    Determine whether a seashell is a live or dead shell. In shelling, a live seashell is a shell with animal tissue still attached to it. This is different from a seashell that is alive since the animal tissue in a live shell is dead. A dead shell is a shell with no animal tissue inside it.

    • Understanding whether a shell is live or dead will affect the way you will choose to clean your shell. For example, live shells will require you to remove the animal tissue inside.
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Part 2

Part 2 of 4:

Removing Tissue from Live Seashells

  1. 1

    Boil the shells to remove animal tissue. Boiling or cooking a live seashell will loosen up any animal tissues inside the shell and make it easier to remove. You will need a pot and tweezers or some tool like a dental instrument to remove the animal tissue. To clean live shells by boiling:

    • Place the seashells in a large pot of room temperature water. Cover the shells with about 2 inches (5 cm) of extra water. It's important to use room temperature water and to put the shells in the pot before heating them up because any sudden heat could crack the shells.
    • Bring the water to a boil. Let the water roll for about 5 minutes. If you are boiling more than one shell, add extra boiling time. As well, larger shells might require more boiling time.
    • Take out the shells with tongs and place them gently on a soft surface like a hot towel.
    • Carefully, with your tweezers or any other tool, pull out any animal tissue from inside the shells and dispose of it.[2]
  2. 2

    Bury your live shells. This method of cleaning out a live shell can take the longest, but many choose to use this method to prevent the shell from being damaged. Boiling and freezing, as well as pulling out animal tissue by hand, can cause a shell to crack. Burying a live shell, provided you bury it in a safe place, protects it from damage and is a natural way to clean out animal tissues. Ants, bugs, and other insects will feed on the shell and clean it out. To clean live shells by burying them:

    • Dig a hole in the ground. Make sure the hole is large enough to fit all your shells and also provide plenty of space between each shell. The hole should also be around 18 to 24 inches (45 to 60 cm) deep to prevent unwanted animals from digging up your seashells or people from stepping on top and crushing your shells.
    • Place your shells evenly with space between them in the hole.
    • Cover the shells with dirt.
    • Wait a few months for insects, larvae, worms, and bacteria to remove the tissue inside the shell. The longer you wait, the better the results.[3]
    • Dig up the shells again and check to see if all signs of animal tissue are gone.
  3. 3

    Freeze your live seashells. Freezing kills any remaining animal tissue inside the shell and makes it easier to remove. To clean a live seashell by freezing:

    • Place your shells in a Ziplock bag. You may need to use several bags if you have many shells.
    • Add water to the bag until all the shells are covered.
    • Place the bag in the freezer.
    • Let it freeze solid for a few days.
    • Remove it from the freezer and let it thaw completely.
    • Take out the shells and pull out the animal tissue from inside the shells.
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Part 3

Part 3 of 4:

Cleaning Dead Seashells

  1. 1

    Soak your seashells in water for a week. The water will dissolve any dirt on your seashells and give you shells that are shiny and clean by the end of the week.[4]

    • Change the water every day or so. Adding fresh water to your seashell soak can result in even cleaner seashells.
    • You can also choose to boil your dead seashells after the week is over to ensure all particles or animal tissue is completely gone from the shells.
    • Alternatively, you can clean them in soapy water with a little bit of vinegar.[5]
  2. 2

    Use bleach to clean your seashells. Bleach will definitely remove any dirt, impurities, and animal tissue from your seashells. However, some seashell collectors warn that using bleach can destroy the colour of your shells and make them smell like bleach forever. To clean a shell using bleach:

    • Fill a pot with equal parts water and bleach. It should be full enough to cover all shells.
    • Soak the shells in the solution. You might notice a flaky, leathery covering coming off the shells. This is the periostracum or the organic coating or "skin" of the shell.
    • Once this coating is gone, you can remove the shells from the solution. Additionally, you can use a toothbrush to remove particles from the shells.
    • Rinse your shells thoroughly and allow to dry completely.
    • Rub baby oil or mineral oil on the shells to restore shine.
  3. 3

    Use toothpaste to clean your shell. Toothpaste is a less strong alternative to bleaching your seashells. To clean a dead shell by using toothpaste:

    • Smear a light coat of toothpaste over one side of the shell at a time.
    • Let the toothpaste-covered shell sit for at least 5 hours, so the toothpaste has time to soak right in. It is fine to leave it overnight to make sure that the toothpaste does its job.
    • Once it has gone tacky and/or hard, depending on the thickness of the layer of toothpaste you applied, get an old toothbrush and a glass of warm water and scrub the shells thoroughly. Make sure you get into all the little cracks and hard-to-see gaps.
    • Make sure that all of the toothpaste has been removed, even if this means rinsing the shells under running water once scrubbed. This will remove the grit and other parts in the toothpaste, remove anything rough or sharp, leaving the surface very smooth with very few flaws.
  4. 4

    Remove barnacles from your shells. If you see that barnacles are attached to your shells, use a dental tool, soft toothbrush, or wire brush to remove the barnacles.

    • This is most effective if the shells have been cleaned previously, either from being soaked in water or bleached.
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Part 4

Part 4 of 4:

Polishing Seashells

  1. 1

    Rub mineral oil over each shell to give it a deep gleam. Allow the shells to dry for at least one full day and then rub oil on the shell.

    • Mineral oil not only restores the shine of the shell, but helps to preserve the shell.
    • Similarly, you can use WD-40. However, when using this material, be sure to use gloves to handle the shells.
  2. 2

    Spray the shells. You can use satin-finish polyurethane or coat with clear nail polish. This type of finish preserves the shell's organic look while giving it an extra glossy shine.

    • Do one side of the shell each day. Allow the shell to dry completely before starting on the other side. Each side can take about a day to dry.
    • If you prefer a natural look, do not polish them.[6]
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  • Question

    Can I use vinegar to clean seashells?

    How to Clean and Polish Seashells: 12 Steps (with Pictures) (15)

    Community Answer

    No. The vinegar will dissolve your shells because it is an acid and shells are calcium carbonate.

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  • Question

    Can I put mineral oil in a bowl, then submerge/dip the shells?

    How to Clean and Polish Seashells: 12 Steps (with Pictures) (16)

    Community Answer

    This would put a very thick layer on the shells and leave a sticky residue. You just want enough to soak into the microscopic pores and give a thin coat.

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  • Question

    Can I use Bio-Oil to polish seashells?

    How to Clean and Polish Seashells: 12 Steps (with Pictures) (17)

    Community Answer

    Mineral oil is much cheaper and more effective! Howard's cutting board oil is about $7 at Home Depot. It is mineral oil and vitamin E.

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    As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy!Claim Your GiftIf wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission.Support wikiHow

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      Tips

      • Leave live shells at the beach. They are homes to animals, and there are plenty of shells that don't need animals to be removed from them. Toss animal-filled ones gently back into the sea and look for ones free of animals instead.

        ⧼thumbs_response⧽

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      • Though they might not be as beautiful, it is best to collect dead shells from the beach rather than collecting live specimens from the ocean, because it's much better for the environment, and you won't have to bother with removing the flesh.

        ⧼thumbs_response⧽

        Helpful15Not Helpful1

      • Alternatively, you can put the live shells near a trash can or dumpster. Find a bin where you can see fly larva or maggots around it, but make sure that the shells are exposed enough for them to be able to get in. The flies may lay eggs in the shell, and then their offspring will eat the dead flesh within the seashell. This process can take at least a week or more.

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        Helpful8Not Helpful3

      How to Clean and Polish Seashells: 12 Steps (with Pictures) (18)

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      Warnings

      • Certain shells (notably Cowries) can be damaged rather than preserved by bleaching and other treatments. If you have a shell that is very special to you, identify the species of shell and research the correct treatment for it. You can also experiment with other shells of the same type that you don't like as much.

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      • Some seashells will not take to boiling well. This includes especially fragile or soft shells. If you are worried about breaking your seashells, bring the pot to an almost boil instead of a complete boil.

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      • Be careful not to burn yourself when removing hot shells from boiling water. Always wear protective gloves.

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      • Bleaching will sometimes strip the colour from shells. If you do not desire a "white" shell, check frequently and/or dilute the bleach solution (you can always add more if necessary).

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      • Always wear protective eye gear, as well as gloves, when handling bleach.

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      References

      1. Patricia Chukerman. Image Consultant & Marketing Specialist. Expert Interview. 8 February 2022.
      2. http://www.citrisurf.com/shell/cleaning.htm
      3. http://www.seashells.org/liveseashellscleaning.html
      4. http://www.seashells.org/liveseashellscleaning.html
      5. Patricia Chukerman. Image Consultant & Marketing Specialist. Expert Interview. 8 February 2022.
      6. Patricia Chukerman. Image Consultant & Marketing Specialist. Expert Interview. 8 February 2022.

      About This Article

      How to Clean and Polish Seashells: 12 Steps (with Pictures) (25)

      Co-authored by:

      Image Consultant & Marketing Specialist

      This article was co-authored by Patricia Chukerman. Patricia Chukerman is an Image Consultant & Marketing Specialist and the Owner of Paperworks Image Consulting and Stoned on Rocks. With more than 36 years of experience, she specializes in helping companies decide how to market themselves. In addition to her work with businesses, she also has more than four years of acting experience and more than five years of crafting experience. Patricia earned her BA from The University of Illinois Chicago. Patricia is also the President of the Dania Beach Chamber of Commerce and the President of the Hollywood Florida Scholarship Foundation. This article has been viewed 821,449 times.

      263 votes - 86%

      Co-authors: 22

      Updated: October 25, 2022

      Views:821,449

      Categories: Nature Crafts

      Article SummaryX

      To clean and polish dead seashells, put them in a pot of room temperature water and boil them for 10 minutes. Then, remove the animal tissue with tweezers. Next, cover the shells with a layer of toothpaste and let them sit for 5 hours. When the time has passed, scrub the shells with an old toothbrush and warm water to remove the dirt. Alternatively, if you're not in a hurry, soak them in water for a week. Finally, leave the shells to dry for a day before polishing them with mineral oil to make them gleam. For tips on how to collect shells and how to remove barnacles, read on!

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      How to Clean and Polish Seashells: 12 Steps (with Pictures) (2024)

      FAQs

      How do you clean and polish seashells? ›

      Soak seashells in clean water for a week to dissolve debris, then deep clean with bleach or toothpaste. Brush away clinging barnacles afterwards. After cleaning, wait for your shells to dry and then polish them with mineral oil or a satin-finish polyurethane spray.

      What is the best way to clean seashells? ›

      In many cases, rinsing in a 50/50 water and bleach solution for 10 minutes, rinsing with cool or lukewarm tap water, and then letting them dry will solve the problem of shells, sand dollars, and urchins that are coated with algae, smelly, or have a dull color.

      What is the easiest way to clean seashells? ›

      Using vinegar is easy, it's simple and it's cheap. Use a small amount of vinegar into a bowl or cup and use a toothbrush to gently scrub the shell. You might have to do this a few times to get the desired effect. Once you're done, simply wash the shell with soap and water.

      How do you clean shells without losing color? ›

      How to Clean Sea Shells Without Losing Color
      1. Soak the shells in room temperature water in a large pot overnight.
      2. Swap out for fresh water and slowly bring the shells to a boil.
      3. Remove the shells from the boiling water using tongs.
      4. Use tweezers to remove dirt and debris.
      5. Wipe the shells clean with a microfiber cloth.
      22 Aug 2022

      How long do you soak seashells? ›

      We recommend letting the shells soak in the solution anywhere from 2-6 days. Once your shells have soaked for several days, the will loose a bit of their original sparkle, but not to worry, that will return. At this point, remove the shells, give them a final water rinse, and allow them to dry completely.

      How do you polish shells to Mother of Pearl? ›

      If the inside of your shell is dull, you can make the mother-of-pearl gleam with a drop of acetone or nail polish remover. Simply rub the acetone on the shiny parts of your shell in a circular motion until it glimmers.

      How long to soak shells in vinegar? ›

      As the shells react with the vinegar they will become more and more fragile until they fall apart. After 24-30 hours our thicker shell had changed just a little bit, so I carefully poured out the vinegar and added fresh vinegar. 48 hours later, there was more action on the thicker shell.

      Can you boil seashells to clean them? ›

      Bring water with shells to a boil. Let the water come to a rolling boil for about 5 minutes ( longer if you have a lot of shells or larger ones). Using tongs, take shells out and put them on a soft surface (like a towel) to cool. Your done and now know how to clean seashells without using bleach!

      What acid do you use to clean seashells? ›

      How to Clean Seashells with Muriatic Acid Solution
      1. In a large glass bottle, add 3/4 cup water and then 1/4 cup of the acid (always add water and then the concentrated acid).
      2. Fill another bottle with just water.
      3. Use the tongs and dip one shell at a time into the muriatic solution for about 3-seconds.
      9 May 2022

      Is it good to keep sea shells at home? ›

      Conch shells are regarded sacred and Vastu guidelines must be followed when keeping them at home. Do note here that right-handed conch shells are auspicious and keeping them at home attracts good luck, wealth and prosperity in the household. Also, experts say that conch shell has health benefits, too.

      Can you use coconut oil to polish seashells? ›

      Gently start polishing your seashell with coconut oil. To do this you can use a toothbrush or cotton buds. This great scallop that I found from the beach last weekend is very smooth so I just spread the oil with my hands. If your seashell has a very rough surface I would recommend using a toothbrush.

      How do you clean seashells with baking soda? ›

      Fill a bowl with about 2 cups of water, 2 tbsp of baking soda, and a dash of salt. Mix it all together until it is fully dissolved. Place your seashells inside for about 10 minutes. Some of the sand, mud, and algae will come off immediately.

      How do you clean a conch without breaking the shell? ›

      If the shell is still intact, you can boil it for at least 15 minutes to clean it. Put the shell in the sun to dry. Once the shell is clean and dry, you can practice playing it.

      What does vinegar do to a seashell? ›

      When you add vinegar to seashells, carbon dioxide bubbles start to form; did you notice that happening during your experiment? This happens because of the chemical reaction between the calcium carbonate which is a base and the vinegar which is an acid. Together they produce a gas called carbon dioxide.

      Does vinegar make seashells clear? ›

      Vinegar Dissolves Calcium Carbonate

      They are a product of the reaction between the calcium carbonate in the seashell and the acetic acid in vinegar. The reaction has a cleansing effect over a period of several minutes, but eventually, the shell will start to dissolve.

      Can you clean seashells with Dawn? ›

      Some folks recommend using a muriatic acid solution. Muriatic acid is a strong chemical and I don't recommend using it. Bleach may even be too much for you. For many shells, Dawn or another dish detergent might just do the trick.

      What does it mean when someone gives you a seashell? ›

      Shells are connected with water as a symbol of fertility and with sea deities and are symbols of prosperity in the form of one generation rising out of the death of another or as a symbol of immortality in the form of shells as grave-gifts.

      How do you clean shell jewelry? ›

      wipe & wash them gently with a soft cloth dipped in warm water to remove surface dirt, excess body oil, or make up after wearing. Microfiber, lint-free soft cotton, or plush paper towel are all good choices. … be sure pearls & shells are completely dry before storing & wearing again.

      Is mother-of-pearl shell worth anything? ›

      Because mother of pearl is much less rare than pearl gemstones, it does not hold value as well. Considering that there is a much larger supply of mother of pearl, it's easy to understand why it is so affordable.

      Why you shouldn't pick up seashells? ›

      Shells provide a diverse swath of environmental functions: they help to stabilize beaches and anchor seagrass; they provide homes for creatures such as hermit crabs and hiding places for small fish; they are used by shorebirds to build nests; and when they break down, they provide nutrients for the organisms living in ...

      What happens when you boil sea shells? ›

      Also, some shells may crack if you boil them too long or if they are too brittle to begin with. If you have chosen a live seashell then this boiling method should remove the tissue from the shell, allowing you to more easily clean it.

      Can you put shells in the microwave? ›

      Cook clams and mussels right in their shells for an easy-to-prepare appetizer. Arrange on pie plate, hinged-side toward the outside of plate, and cover loosely with wax paper. For three 5-ounce clams, microwave at high (100%) power for approximately 3 to 5 minutes or until shells open.

      Can you clean shells with alcohol? ›

      Shells such as cowrie and conus have a natural shine that can be damaged by harsh treatment. To clean them, soak them in ethanol, which is 90 percent pure alcohol, until the outer layer is clean.

      What is the best time of day to look for seashells? ›

      SHELLING TIP #1: GO EARLY IN THE MORNING

      The best time, in general, is at low tide especially when the tides are low early in the morning. Finding seashells is often a matter of being on the beach at the right time. It is especially good after strong winds or storms.

      Where should seashells be placed in the house? ›

      Place six shells in the north-west corner along with silver or Chinese coins or other regular coins in each one of them to attract blessings from heaven. They can also be placed in the wealth corner (south-east) as they come from water. Water in Feng Shui is akin to wealth.

      Do shells have life? ›

      You can think of a seashell kind of like your own hair. Your hair grows and is part of you, but it isn't alive on its own. A living mollusk produces a shell with its body, but the shell itself isn't alive. When a mollusk dies, it leaves its shell behind.

      Can you use nail polish on shells? ›

      Yep, you heard me right, nail polish is perfect for paining sea shells, it still lets the natural texture of the shell show through, dries quickly and comes in lots of fun colors. My daughter and I sat down and painted all of the shells one afternoon.

      What happens when you put a seashell in vinegar? ›

      VINEGAR WITH SEASHELLS

      When you add the seashells to vinegar, carbon dioxide bubbles start to form! Did you notice all the bubbling action? This a result of the chemical reaction between the calcium carbonate which is a base and the vinegar which is an acid. Together they produce a gas called carbon dioxide.

      Does baking soda clean seashells? ›

      Fill a bowl with about 2 cups of water, 2 tbsp of baking soda, and a dash of salt. Mix it all together until it is fully dissolved. Place your seashells inside for about 10 minutes. Some of the sand, mud, and algae will come off immediately.

      How do I make my shells shiny again? ›

      To make your seashells shine for a polished look, rub them with mineral oil or baby oil and allow that to dry for 24 hours.

      Does boiling seashells clean them? ›

      Bring water with shells to a boil. Let the water come to a rolling boil for about 5 minutes ( longer if you have a lot of shells or larger ones). Using tongs, take shells out and put them on a soft surface (like a towel) to cool. Your done and now know how to clean seashells without using bleach!

      What happens when you mix vinegar and eggshell? ›

      Eggshells are made of calcium carbonate. If you soak an egg in vinegar the eggshell will absorb the acid and break down, or dissolve. The calcium carbonate will become carbon dioxide gas, which will go into the air. What is left is the soft tissue that lined the inside of the eggshell.

      Will bleach hurt seashells? ›

      Soaking in bleach water will not harm your shells or take away any of their natural color (Note: this does not apply to sand dollars, crab carapaces, and starfish!)

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