Is Your Obsidian Real or Fake?
How to tell genuine obsidian from imitations
Obsidian is itself a natural glass, so the issue isn't 'glass vs stone' — it's man-made glass and slag sold as obsidian, especially for the pricier 'rainbow,' 'blue,' 'green,' and 'cherry' varieties, many of which are simply manufactured colored glass.
Check your obsidian now
Upload a photo for an instant AI identification — then unlock an authenticity read and its estimated value.
📷Upload or snap a photoGet instant ID · value estimate · authenticity check
Common obsidian fakes & look-alikes
- Manufactured colored glass. Bright, evenly colored 'blue,' 'green,' or 'cherry obsidian' is almost always man-made glass — those vivid single colors don't occur in natural obsidian, which is black (sometimes with sheen or snowflake patterns).
- Goldstone. Man-made copper-fleck glass ('goldstone') has a dense, regular metallic sparkle that natural obsidian never shows.
- Glass slag. Industrial glass slag is sold as obsidian; it may show abundant air bubbles and unnatural swirls of color.
Simple at-home tests
- 1Color reality check. Natural obsidian is black — sometimes with silver/gold sheen, rainbow flash, or white 'snowflakes.' Solid bright blue, green, purple, or red is a manufactured-glass flag.
- 2Effect vs dye. Natural sheen and rainbow come from internal nanolayers, not surface color. A flat, painted-looking color layer suggests manufactured glass.
- 3Bubbles under a loupe. Dense, uniform round bubbles suggest manufactured glass; natural obsidian may have a few but not regular, heavy bubbling.
At-home tests are indicative, not definitive — for valuable pieces, get a professional gemologist's opinion.
The bottom line
Black obsidian with natural sheen, rainbow, or snowflake effects is genuine. Vividly colored 'obsidian' in blue, green, or cherry-red is manufactured glass, not a natural stone.
FAQ
- How can I tell if my obsidian is real?
- Black obsidian with natural sheen, rainbow, or snowflake effects is genuine. Vividly colored 'obsidian' in blue, green, or cherry-red is manufactured glass, not a natural stone.
- How much is snowflake obsidian worth?
- Snowflake obsidian is one of the cheapest obsidian varieties — $2–$15 for tumbled stones and $8–$40 for cabochons, spheres, and carvings. It's abundant, so only large or finely carved pieces go higher. The grey-white 'snowflakes' are natural cristobalite crystals in the black glass.
- Is obsidian worth anything?
- Plain black and snowflake obsidian are cheap, but rainbow, fire, and sheen varieties plus skilled carvings reach $30–$200+.
- Is obsidian just glass?
- Yes — it's natural volcanic glass. Its value is about variety, optical effects, and craftsmanship rather than rarity of the material.
More real-or-fake guides
Real or fake amethyst?Real or fake rose quartz?Real or fake citrine?Real or fake clear quartz?Real or fake pyrite?Real or fake turquoise?Real or fake moldavite?Real or fake malachite?Real or fake opal?Real or fake tiger's eye?Real or fake jade?Real or fake lapis lazuli?Real or fake carnelian?Real or fake jasper?Real or fake agate?Real or fake aventurine?Real or fake hematite?Real or fake moonstone?Real or fake sunstone?Real or fake aquamarine?Real or fake topaz?Real or fake peridot?Real or fake spinel?