mineral

Pink Sapphire

Corundum (Al2O3 with trace Chromium and Iron)

Hardness: 9 on Mohs scale; Color: Ranges from light pink to deep magenta; Luster: Adamantine to vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: None (has parting); Specific gravity: 3.95-4.10

Hardness: 9 on Mohs scale
Color: Ranges from light pink to deep magenta
Luster: Adamantine to vitreous

Identified March 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic rocks such as marble or gneiss, and in igneous rocks like basalt. They are often concentrated in secondary alluvial deposits (river beds) after being weathered from their host rock. Geological age varies by deposit, ranging from 500 million to several billion years.

Uses & applications

Primarily used as a high-value gemstone in fine jewelry (rings, earrings, necklaces). In industry, synthetic corundum is used for scratch-resistant watch crystals, high-pressure windows, and abrasives.

Geological facts

Sapphires and Rubies are actually the same mineral (Corundum). The only difference is the color caused by trace elements; if the color is anything other than red, it is called a sapphire. Pink sapphires have historically represented loyalty, trust, and love.

Field identification & locations

Identify in the field by its extreme hardness (cannot be scratched by steel or glass) and its high density. Common locations include Sri Lanka, Madagascar, Myanmar, and East Africa. Collectors look for clarity, saturation of color, and the presence of 'silk' (rutile inclusions) which can prove natural origin.

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