Rock Identifier
Red/pink faceted gemstone, likely synthetic ruby or red glass (Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually) — gemstone
gemstone

Red/pink faceted gemstone, likely synthetic ruby or red glass

Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually

AI-generated identification · may be incorrect

Oval faceted cabochon-like cut, vivid magenta-red color, transparent to translucent, vitreous luster. Ruby hardness is Mohs 9; glass is about 5–5.5. The apparent curved internal feature and unusually uniform color make synthetic ruby or glass plausible.

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Physical properties

Oval faceted cabochon-like cut, vivid magenta-red color, transparent to translucent, vitreous luster. Ruby hardness is Mohs 9; glass is about 5–5.5. The apparent curved internal feature and unusually uniform color make synthetic ruby or glass plausible.

Formation & geological history

Natural ruby forms in metamorphic rocks and some igneous-related deposits; synthetic ruby is laboratory-grown. The photographed cut does not establish geological age or natural origin.

Uses & applications

Ruby is used in jewelry and precision instruments; synthetic ruby is common in jewelry and laser components. Glass imitations have mainly decorative value.

Geological facts

Natural ruby commonly shows inclusions, color zoning, or distinctive fluorescence; a loupe, refractive-index test, and spectroscopy are needed for reliable identification.

Field identification & locations

At approximately 5.9°N, 116.1°E (Sabah, Borneo), corundum and ruby are possible but this image alone cannot distinguish them from common imitation materials. Check hardness, specific gravity, refractive index, and inclusions; do not scratch it if valuable.