mineral

White Sapphire

Corundum (Al2O3)

AI-generated identification · may be incorrect

Hardness: 9 on Mohs scale; Color: Colorless (white); Luster: Adamantine to Vitreous; Crystal Structure: Trigonal/Hexagonal; Specific Gravity: 3.95-4.03.

Hardness: 9 on Mohs scale
Color: Colorless (white)
Luster: Adamantine to Vitreous

Identified June 13, 2026More mineral →

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Physical properties

Hardness: 9 on Mohs scale; Color: Colorless (white); Luster: Adamantine to Vitreous; Crystal Structure: Trigonal/Hexagonal; Specific Gravity: 3.95-4.03.

Formation & geological history

Formed in metamorphic rocks seperti marble or gneiss, and igneous rocks like syenite. Common in alluvial gravel deposits (illama) in Sri Lanka.

Uses & applications

Primarily used in jewelry as a diamond alternative; also used in industrial applications requiring high scratch resistance like watch crystals and optical instruments.

Geological facts

The location provided (6.7°N, 80.4°E) is near Ratnapura, Sri Lanka, famously known as the 'City of Gems'. Sri Lanka is world-renowned for high-quality corundum including sapphires.

Field identification & locations

Identify by its extreme hardness (scratches glass/topaz) and high density. In Ratnapura, it is found in the 'illam' layer of gravel. Faceted specimens show high brilliance but less fire than diamond.