Cherry Obsidian Identification Guide
Identify cherry obsidian, recognize that most red-and-black material is man-made glass, and tell genuine volcanic glass from imitations.
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What Cherry Obsidian Looks Like
Cherry obsidian is sold as a bright cherry-red to red-and-black glassy material with a brilliant vitreous (glassy) luster, translucency on thin edges, and smooth conchoidal fracture. Importantly, most "cherry obsidian" on the market is manufactured colored glass (slag/art glass), not natural volcanic obsidian, because vivid even cherry-red obsidian does not occur naturally; natural red obsidian is typically a streaky mahogany or brown-red from hematite. Treat uniform candy-red, swirled red-and-black material as man-made unless proven otherwise.
Step-by-Step Field ID Checklist
- Color: Note the color. Uniform bright cherry-red is a red flag for manufactured glass.
- Luster and transparency: Confirm glassy luster and translucency typical of all glass.
- Fracture: Look for conchoidal (shell-like) fracture with sharp edges, common to both glass and obsidian.
- Bubbles: Inspect with a loupe; perfectly round, evenly distributed bubbles indicate man-made glass.
- Hardness test: Both natural obsidian and glass are about Mohs 5–5.5.
- Swirl pattern: Even, deliberate red/black swirls suggest molten manufactured glass.
Key Diagnostic Tests
- Hardness: Mohs ~5–5.5 (does not scratch quartz; can be scratched by it).
- Fracture: Conchoidal in both natural and synthetic; not diagnostic alone.
- Inclusions: Round bubbles and overly uniform color point to glass; natural obsidian may show flow bands, crystallites, or gas bubbles that are irregular.
- Density: ~2.4 g/cm³.
- Acid reaction: None.
Common Look-Alikes and How to Tell Them Apart
- Manufactured/slag glass: The most common substitute; tell by perfectly round bubbles, candy-bright color, and overly even swirls.
- Mahogany obsidian: Genuine natural red-brown obsidian with streaky hematite banding; duller and more earthy than cherry glass.
- Red jasper / carnelian: Harder (Mohs 7) and not glassy-translucent in the same way; obsidian/glass is softer.
- Goldstone: Man-made glass with copper sparkles; distinguished by glittery aventurescence.
- Apache tears: Natural dark obsidian nodules, never bright cherry-red.
Where Cherry Obsidian Is Typically Found
Genuine volcanic obsidian forms from rapidly cooled rhyolitic lava in places like the western U.S. (Oregon, California, Idaho), Mexico, and Iceland, but natural cherry-red varieties are essentially absent. Most cherry obsidian sold by dealers is produced as colored glass, so the realistic "source" is a glassworks, not a lava flow. Approach field-found cherry-red glass with skepticism.
Frequently asked questions
Is cherry obsidian real or man-made?
Most cherry obsidian is man-made colored glass; vivid, even cherry-red volcanic obsidian does not occur naturally, and natural red obsidian is the streaky brown-red mahogany variety instead.
How can you tell if cherry obsidian is fake?
Look for perfectly round, evenly spaced bubbles, candy-bright uniform color, and deliberate red-and-black swirls under a loupe, all signs of manufactured glass rather than natural obsidian.
What is the difference between cherry obsidian and mahogany obsidian?
Mahogany obsidian is genuine natural volcanic glass with earthy red-brown hematite banding, while cherry obsidian is typically bright manufactured glass with uniform red color.
Is cherry obsidian valuable?
Because most cherry obsidian is manufactured glass, it has modest value and is sold as an affordable decorative material rather than a rare natural gemstone.