Rock Identifier
Color-change gemstone ring (stone possibly alexandrite or a synthetic imitation) (Undetermined from the image; alexandrite is chrysoberyl, BeAl₂O₄) — gemstone
gemstone

Color-change gemstone ring (stone possibly alexandrite or a synthetic imitation)

Undetermined from the image; alexandrite is chrysoberyl, BeAl₂O₄

AI-generated identification · may be incorrect

The small faceted stone appears dark and multicolored under indoor light; its hardness, luster, and crystal structure cannot be identified reliably from a photograph. The ring setting is metal and is not itself geological material.

Identified More gemstone →
Explore Color-change gemstone ring (stone possibly alexandrite or a synthetic imitation) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

Physical properties

The small faceted stone appears dark and multicolored under indoor light; its hardness, luster, and crystal structure cannot be identified reliably from a photograph. The ring setting is metal and is not itself geological material.

Formation & geological history

The image does not establish whether the gem is natural, lab-grown, or a simulant. Natural alexandrite forms in chromium-bearing geological environments and is rare; its age depends on the deposit.

Uses & applications

Gemstone jewelry and collecting; alexandrite is prized for a red-to-green color change.

Geological facts

Alexandrite’s characteristic color change is caused by how chromium-bearing chrysoberyl absorbs light; appearance in one image is not enough to confirm it.

Field identification & locations

Gem identity requires examination under different light sources and gemological testing, such as refractive index and spectroscopy. Do not infer alexandrite solely from the apparent colors.