Waterproof Ancient Marine Fossil Necklace – Real Fossils, Built to Last
Own a genuine piece of the ocean! This authentic necklace features a real, ancient Bull Shark fossil tooth (2–23 million years old), ethically sourced by scuba diving off Florida's coast. It's perfect for surfers, swimmers and ocean lovers, and made to be waterproof, durable and one of a kind.
Each fossil is matched to your cord length: shorter cords come with smaller teeth, and longer cords feature larger ones.
Why choose this necklace?
- 100% waterproof and adventure-ready: wear it surfing, swimming or exploring without worry.
- Ethically handpicked: every fossil is responsibly sourced and handcrafted by SHRKco owner Jeffrey Heim.
- Timeless style: Bull Sharks are iconic symbols of strength, resilience and connection to the ocean.
Which length should I get?
- 14": choker. Sits high and snug around the neck.
- 16": sits at the base of the neck. A great standard length for kids.
- 18": the classic. Hits at the collarbone. Our most popular length.
- 20": just below the collarbone. A popular everyday length.
- 22": top of the chest. Great for showing off the pendant.
- 24": center of the chest. Easy to pull on and off.
Tooth size is matched to length: small teeth on 14"–16", medium on 18"–20" and large on 22"–24". Available from 14" to 24" in silver, sterling silver, black or gold wire wrap. Fit varies with neck and chest size. For an exact fit, lay a string or a necklace you own where you like it and measure it.
Shipping & gifting
- FREE US shipping on orders $50+. Otherwise $5.95 for 3–5 business day delivery.
- Tracked worldwide shipping from $18.95, and free on international orders over $100.
- A gift with a story: every fossil is hand-found by our founder on a dive, so no two are exactly alike. Yours will look like the photos but have its own natural shape and color.
FAQ
Is this a real fossil? Yes. It is a genuine fossilized shark tooth, not resin or a replica.
Can I wear it in the water? Yes. It is made to be worn surfing, swimming and in the shower.
Can I pick my tooth size? Tooth size comes from the length you choose: small for 14"–16", medium for 18"–20" and large for 22"–24". Want a bigger tooth? Choose a longer length.
Can I request a certain color or shade? Yes. Leave a note with your order number in the chat box (bottom right) and we'll do our best to match it.