Rock Identifier
Pink faceted gemstone, likely synthetic ruby or pink sapphire (Corundum (Al₂O₃), possibly chromium-colored ruby; synthetic origin likely) — gemstone
gemstone

Pink faceted gemstone, likely synthetic ruby or pink sapphire

Corundum (Al₂O₃), possibly chromium-colored ruby; synthetic origin likely

AI-generated identification · may be incorrect

Transparent, vivid hot-pink/red, strongly vitreous luster, emerald/step-cut rectangular faceting, no visible inclusions. Corundum hardness is Mohs 9, with no cleavage and specific gravity about 4.0; the surrounding setting appears gold-colored metal.

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Physical properties

Transparent, vivid hot-pink/red, strongly vitreous luster, emerald/step-cut rectangular faceting, no visible inclusions. Corundum hardness is Mohs 9, with no cleavage and specific gravity about 4.0; the surrounding setting appears gold-colored metal.

Formation & geological history

Natural ruby or pink sapphire forms in metamorphic rocks and occasionally basaltic settings over geologic time; synthetic corundum is laboratory-grown. A photograph cannot establish natural versus synthetic or confirm the species.

Uses & applications

Used in jewelry, watch bearings, lasers, and abrasives. Value depends heavily on natural origin, treatment, color, clarity, size, and certification.

Geological facts

Ruby is red corundum; pink sapphire is corundum colored by trace elements, and the boundary between them varies by convention. Intense uniform color and very clean appearance can suggest synthetic material, though testing is required.

Field identification & locations

Identify with refractive index, spectroscopy, microscopy, and an authenticated gemological report—not scratch testing. Common natural sources include Myanmar, Sri Lanka, Mozambique, Vietnam, and Madagascar.