If you’ve come home from the beach with a handful of shark teeth, you have more options than tossing them in a drawer. Shark teeth can be cleaned and displayed, turned into jewelry, identified by species, or even sold if you’ve found something rare. What you do depends on whether your teeth are modern (white or off-white) or fossilized (black, gray, or brown), and how much effort you want to put in.
Modern vs. Fossil: Know What You Have
The first thing to figure out is whether your shark teeth are modern or fossilized, because that changes how you clean, store, and value them. Modern shark teeth are whitish, sometimes with a grayish or slightly translucent look. Fossilized teeth have absorbed minerals from the sediment they were buried in, turning them black, gray, brown, or occasionally greenish depending on the local chemistry. The fossilization process takes at least 10,000 years, so even a “young” fossil tooth is ancient.
One common misconception: you can’t determine a fossil tooth’s age by its color alone. A jet-black tooth isn’t necessarily older than a tan one. The color depends entirely on which minerals replaced the original calcium during fossilization, not how long the tooth sat in the ground.
Cleaning and Preserving Your Teeth
For modern teeth, start with warm water and a soft toothbrush to remove sand and debris. If you want to whiten them further, soak them in a roughly 6% hydrogen peroxide solution (slightly stronger than the standard 3% drugstore bottle) in cold water for five to six hours, checking periodically until you’re happy with the color. Rinse thoroughly afterward.
Fossil teeth need gentler handling. Many are more brittle than they look, and soaking them in water can cause crumbling if the tooth has internal cracks. A dry brush is usually the safest first step. For fragile fossils that are flaking or cracking, museum preparators use an acrylic consolidant dissolved in acetone. A dilute solution (around 5%) can be wicked into cracks to stabilize the tooth from the inside out. You can find this consolidant at fossil supply shops. For most beach-found fossil teeth in decent condition, though, a gentle brushing and a coat of clear nail polish or a thin acrylic sealant is enough to keep them intact for years.
Identifying the Species
Identifying which shark a tooth came from is one of the most satisfying parts of collecting. You don’t need to be a paleontologist. A few features narrow things down quickly.
- Serrations: Teeth with coarse, saw-like edges along the cutting edge often come from species like great whites or tiger sharks. Smooth-edged teeth point toward makos or sand tigers.
- Shape: Broad, triangular teeth with a thick root are classic great white or megalodon indicators. Narrow, needle-like teeth often belong to sand sharks. Teeth with a distinct notch on one or both cutting edges suggest requiem sharks like bull or blacktip species.
- Root structure: A strongly curved root with no obvious groove across the back suggests tiger shark. A straighter root with a visible groove running across it points toward other species in the requiem shark family.
- Size: Most beach-found teeth are under an inch. Anything over two inches is a noteworthy find, and teeth over four inches are almost certainly from a megalodon.
The Florida Museum of Natural History publishes a free online identification guide that walks you through a step-by-step key based on these features. It’s the best starting resource for beginners.
Turning Teeth Into Jewelry
Wire wrapping is the most popular way to turn a shark tooth into a pendant without drilling a hole (which risks cracking the tooth). You’ll want three gauges of wire: a thicker gauge like 22 for the structural frame, a medium 24 gauge for securing the tooth, and a thin 28 gauge for decorative wrapping. Dead soft tempered wire is easier to work with for beginners since it bends without fighting you, though half-hard wire holds its shape better over time.
The basic technique involves creating a bail (the loop the chain passes through) from the thicker wire, then cradling the tooth’s root in a wire frame and securing it with tight wraps of the thinner wire around both the frame and the tooth. Different tooth shapes require slightly different approaches, so expect some trial and error. Be careful with fossil teeth, as they’re brittle and can snap under pressure from tight wrapping.
Displaying a Collection
For long-term display, the goal is keeping teeth away from materials that could damage them chemically over time. Glass or acrylic display cases are ideal because they don’t react with the tooth’s minerals. If you’re lining a shadow box or display tray, use acid-free fabric or foam. Regular cotton batting, cardboard, and some craft foams release acids over time that can discolor or degrade fossils.
Riker mounts (those flat glass-topped cases with cotton fill) are a popular budget option for smaller collections. For individual standout teeth, small acrylic stands or mineral display easels work well and keep the tooth visible from multiple angles. Keep your display out of direct sunlight, which can fade fossil coloring over time.
Selling Valuable Teeth
Most beach-found shark teeth are worth very little monetarily, but megalodon teeth are the major exception. Megalodon teeth are always measured diagonally, from the corner of the root to the tip. Small ones (under three inches) sell for modest amounts, but prices climb steeply with size. Once you reach the four-to-five-inch range, the increase becomes exponential because larger teeth are dramatically harder to find. The real inflection point is six inches: a six-inch megalodon tooth regularly sells for more than double what a comparable 5¾-inch tooth brings. Teeth over seven inches exist but are exceedingly rare.
Beyond size, value depends on enamel condition (how much is intact and whether it’s peeled or chipped), color, symmetry, and whether the root is complete. A “perfect” megalodon tooth with no flaws commands many times the price of one with even minor damage, simply because perfection is so uncommon. If you think you have something valuable, digital calipers are worth the small investment, since even hundredths of an inch matter at the higher size ranges.
Where You Can Legally Collect
In Florida, the most popular shark tooth hunting destination in the U.S., the rules are straightforward but location-dependent. On public beaches and most state-owned land, you can collect shark teeth without a permit. Florida specifically exempts shark teeth from the vertebrate fossil permit requirement that applies to other animal fossils.
However, collecting is not allowed in national parks, state parks, wildlife refuges, or water management district lands. This catches people off guard since some of the best fossil-hunting beaches border protected areas. The distinction matters: picking up a tooth on a public beach is perfectly legal, but walking into an adjacent state park and doing the same thing is not. Other states have their own rules, and federal land generally prohibits fossil vertebrate collection without a permit. When in doubt, check with local land management before pocketing anything.
Handling Sharp Teeth Safely
Fresh shark teeth are genuinely sharp, and even some well-preserved fossil teeth retain cutting edges. Beyond the obvious risk of a cut, modern shark teeth can harbor marine bacteria, including several Vibrio species that are common in seawater and known to cause wound infections. A study that cultured bacteria from great white shark teeth found multiple Vibrio strains along with other potentially infectious organisms. This isn’t a concern with fossilized teeth (the bacteria are long gone), but if you cut yourself on a fresh tooth, clean the wound thoroughly and watch for signs of infection like unusual redness, swelling, or warmth around the cut.