gemstone
Pink Spinel
Magnesium aluminum oxide (MgAl2O4)
AI-generated identification · may be incorrectHardness of 8 on the Mohs scale, pink to red color, vitreous luster, and an isometric crystal system with octahedral habits.
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Physical properties
Hardness of 8 on the Mohs scale, pink to red color, vitreous luster, and an isometric crystal system with octahedral habits.
Formation & geological history
Forms through contact and regional metamorphism in magnesium-rich limestones and marbles, as well as in alluvial gravel placers.
Uses & applications
Used primarily as a precious gemstone in fine jewelry and valued by mineral collectors.
Geological facts
Many famous historic rubies, including the Black Prince's Ruby in the British Imperial State Crown, are actually large spinels.
Field identification & locations
Identified by its octahedral crystal form, high hardness, and lack of cleavage; found globally in countries like Myanmar, Sri Lanka, and Vietnam.
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