Rock Identifier
Red faceted gemstone, likely synthetic ruby or red glass imitation (Possibly synthetic corundum (Al₂O₃:Cr³⁺); image alone cannot distinguish it from glass or another imitation) — gemstone
gemstone

Red faceted gemstone, likely synthetic ruby or red glass imitation

Possibly synthetic corundum (Al₂O₃:Cr³⁺); image alone cannot distinguish it from glass or another imitation

AI-generated identification · may be incorrect

Transparent vivid red, faceted step/emerald-style cut, mounted in a metal setting. Ruby has Mohs hardness 9 and hexagonal crystal structure; glass imitations are typically Mohs 5–6 and lack crystal structure.

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Physical properties

Transparent vivid red, faceted step/emerald-style cut, mounted in a metal setting. Ruby has Mohs hardness 9 and hexagonal crystal structure; glass imitations are typically Mohs 5–6 and lack crystal structure.

Formation & geological history

If ruby, corundum crystallized in metamorphic rocks or formed in certain igneous deposits; synthetic ruby is grown industrially. The image does not establish the stone’s natural or synthetic origin or age.

Uses & applications

Ruby is used in jewelry and specialized optical or industrial applications; inexpensive imitations are mainly decorative.

Geological facts

Ruby’s red color comes chiefly from chromium. Visual appearance alone is insufficient for reliable identification.

Field identification & locations

A gemologist can distinguish ruby from glass or other simulants using magnification, refractive index, and hardness tests; avoid scratch testing a mounted stone. Common ruby sources include Myanmar, Mozambique, and Sri Lanka.