You just bought a new bracelet. It looks gorgeous in the product photos, feels nice on your wrist, and the price was right. But then that little voice creeps in: is this actually real, or did I just pay for fancy glass?
Honestly? It's a fair question. Black obsidian and tiger eye are two of the most popular stones on the market—which also means they're two of the most faked. The good news is you don't need a geology degree or a lab to figure out the truth. A few simple checks at home will tell you everything you need to know.
Let's walk through them.
First, a Quick Reality Check
Before we get into the tests, here's something worth keeping in mind: a fake stone isn't necessarily a bad stone. Some imitation tiger eye is actually beautiful glasswork. Some "obsidian" beads are well-crafted hematite or black glass. They can still look great on your wrist.
The problem is paying real-stone prices for something that isn't. If you paid $15 for a bracelet from a street vendor, you might not care. If you paid $80 from a boutique? You probably want to know what you actually got.
So let's find out.
Testing Black Obsidian: It's Volcanic Glass, Not Magic
Here's something that surprises people: black obsidian is glass. Natural volcanic glass, to be precise. Lava cools so fast that crystals don't have time to form, and you get this smooth, glossy, jet-black material.
That also means obsidian is relatively easy to fake—because regular man-made glass looks pretty similar to the untrained eye.
The One Test That Catches Most Fakes
Hold your bracelet up to a bright light—a phone flashlight works perfectly. Try to see light pass through a thin edge of one bead.
Real obsidian: the light will glow through as a brownish or grayish color. The color doesn't change dramatically; it just gets a bit warmer.
Fake (man-made glass): the transmitted light will shift to blue, purple, or red. This is the single biggest tell.
This works because real volcanic glass and commercial glass have different chemical compositions. That color shift is hard to fake.
What Else to Look For
Grab a magnifying glass or just use your phone's camera zoomed in. Check the bead closely:
Real obsidian: might have tiny, stretched bubble trails—irregular shapes from the cooling process. It won't have perfect little bubbles.
Fake (manufactured glass): you'll see perfectly round bubbles evenly spaced. That's a factory signature, not a natural one.
Also run your fingernail across the surface of the bead. Natural obsidian doesn't have mold seams. If you feel a thin raised line, you're holding molded glass, not volcanic rock.
Testing Tiger Eye: It's All About the "Eye"
Tiger eye gets its name from exactly what you'd expect: that golden-brown shimmer that moves across the surface like a cat's eye. The technical term for it is chatoyancy, but you don't need to remember that—you just need to know how to spot the real thing.
The Light Movement Test (This One's the Gold Standard)
Hold your bracelet under a single light source—a desk lamp works best. Slowly rotate the bracelet back and forth.
Real tiger eye: that band of light will glide smoothly across the surface as you move it. It moves with you, shifting and flowing like liquid gold. That's the chatoyancy at work, and it's unmistakable once you see it.
Fake (resin, painted glass, or plastic): the "eye" is static. It might look like a line painted on the surface, or a pattern printed underneath. When you tilt it, nothing changes. It's dead.
This single test will catch about 90% of fake tiger eye.
The Hardness Test (If You Want to Be Thorough)
Tiger eye is a form of quartz, which means it's pretty tough—7 on the Mohs scale. For reference, that's harder than glass.
Real tiger eye: can scratch a glass surface without getting damaged itself. Try rubbing the edge of a bead against the bottom of a glass bottle (gently). If it leaves a scratch, that's a good sign.
Fake (resin or plastic): won't scratch glass, and might even get scratched by a metal key.
The "Too Perfect" Problem
This one is subtle but important. Look at the beads with a magnifying glass.
Real tiger eye: has irregular fiber patterns running through it—some lighter, some darker, with natural variation. There might be tiny imperfections or mineral specks. That's how you know it's a rock, not a factory product.
Fake (glass or resin): the pattern looks too uniform, like wallpaper repeating. If the fibers all run exactly the same length and spacing, it's probably not natural.
Once you know what to look for, the easiest way to skip the guesswork is to buy from sellers who state their materials clearly. Explore our black obsidian bracelets and tiger eye bracelets — every product page lists the stone, sizing, and care details, so you know exactly what you're getting.