Identification guide · Organic Gems
How to Identify Amber
Amber is usually yellow, orange, and brown with a resinous luster and is transparent. It has a Mohs hardness of 2.5. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Its streak is white. It is most often confused with Sphalerite, Sulfur, and Mimetite; the tests below separate them.
Amber identification checklist
| Color | Yellow, Orange, Brown, Red, Green, Blue | Look at a clean, dry surface in daylight. Color zoning, banding or spots are as diagnostic as the hue. |
|---|---|---|
| Luster | Resinous | Compare a fresh surface with glass and metal; this luster is softer than either. |
| Transparency | Transparent | Hold a thin edge up to a bright light and note whether light passes through. |
| Mohs hardness | 2.5 | A copper coin (Mohs 3.5) scratches it, but a fingernail does not. |
| Streak | White | Drag a corner across unglazed porcelain (the back of a bathroom tile) and check the powder color. |
| Cleavage | None | |
| Fracture | Conchoidal | Broken surfaces show smooth, curved, shell-like scoops. |
| Specific gravity | 1.1 | Noticeably light in the hand for its size (specific gravity about 1.1). |
| Crystal system | Amorphous |
Amber look-alikes and how to tell them apart
Sphalerite is harder (Mohs 3.75) than Amber (Mohs 2.5), so Sphalerite will scratch Amber and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Amber vs Sphalerite →
Both sit near Mohs 2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Amber vs Sulfur →
Mimetite is harder (Mohs 3.75) than Amber (Mohs 2.5), so Mimetite will scratch Amber and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Amber vs Mimetite →
Both sit near Mohs 2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Amber vs Orpiment →
Is my Amber real?
- Hardness: real Amber sits at Mohs 2.5. Glass imitations are about 5.5, so use a steel file and a known reference mineral rather than glass alone.
- Bubbles: round gas bubbles under a 10x loupe mean glass or resin, never a natural stone.
- Color: dyed material concentrates color in cracks and pores; look for pigment collecting at the edges of fractures.
- Temperature: natural crystals feel cool and take longer to warm in your hand than plastic or resin.
Field tips
- Check whether the specimen's color and texture match typical Amber examples.
- Use hardness, streak, luster, grain size, and locality together; no single trait is enough for every specimen.
Amber identification FAQ
How can you tell if a rock is Amber?
Check the color (yellow, orange, brown, and red), the resinous luster, a Mohs hardness of 2.5 and a white streak. Photographing it with the StoneSnap app gives a match in seconds.
What is the hardness of Amber?
Amber has a Mohs hardness of 2.5. A copper coin (Mohs 3.5) scratches it, but a fingernail does not.
What is the difference between Amber and Sphalerite?
Amber (Mohs 2.5, resinous luster) and Sphalerite (Mohs 3.75, resinous luster) look alike, but hardness, streak and heft usually separate them. See the full Amber vs Sphalerite comparison for a side-by-side table.
How do I know if my Amber is real?
Real Amber matches the hardness listed above, shows no round gas bubbles under magnification, and does not concentrate dye in cracks. Glass and resin fakes fail at least one of those checks.
Is Amber worth anything?
Entry-level Amber specimens sell for around $20, typical collector pieces about $100, and premium examples $5000 or more depending on size, quality and locality.
What color is Amber?
Amber is most often yellow, orange, brown, and red. Color varies with impurities and locality, so confirm with hardness and luster rather than color alone.
