gemstone

Likely synthetic ruby (corundum)

Corundum (Al₂O₃), probably laboratory-grown

AI-generated identification · may be incorrect

Red to orange-red, glassy luster, elongated rough crystal-like form; Mohs hardness 9 and trigonal crystal structure. The image alone cannot confirm whether it is natural or synthetic.

Identified October 12, 2026More gemstone →

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Physical properties

Red to orange-red, glassy luster, elongated rough crystal-like form; Mohs hardness 9 and trigonal crystal structure. The image alone cannot confirm whether it is natural or synthetic.

Formation & geological history

Ruby forms when chromium-bearing corundum crystallizes in aluminum-rich, silica-poor rocks, commonly during metamorphism; natural deposits range from ancient to recent geological settings. Bright, unusually uniform material may be synthetic, produced by industrial crystal-growth methods.

Uses & applications

Used in jewelry and as a durable watch bearing, laser material, and industrial abrasive.

Geological facts

Ruby is the red variety of corundum; chromium produces its color. Synthetic ruby has essentially the same chemistry and hardness as natural ruby.

Field identification & locations

Natural ruby is commonly found in Myanmar, Mozambique, Sri Lanka, and Madagascar. Check for natural inclusions and growth zoning with magnification; laboratory testing is needed for reliable identification.