gemstone

Pink Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Hardness: 8 on Mohs scale; Color: Pink to vivid magenta; Luster: Vitreous; Crystal structure: Cubic; Specific gravity: 3.58–3.61; Cleavage: Indistinct.

Hardness: 8 on Mohs scale
Color: Pink to vivid magenta
Luster: Vitreous

Identified July 1, 2026More gemstone →

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Physical properties

Hardness: 8 on Mohs scale; Color: Pink to vivid magenta; Luster: Vitreous; Crystal structure: Cubic; Specific gravity: 3.58–3.61; Cleavage: Indistinct.

Formation & geological history

Formed through regional metamorphism where limestone or dolomite is subjected to high heat and pressure, often found in contact with igneous intrusions.

Uses & applications

Primarily used as a high-end gemstone in jewelry (rings, pendants) and as a collector's mineral specimen.

Geological facts

Spinel was long confused with ruby; the 'Black Prince’s Ruby' in the British Imperial State Crown is actually a red spinel. Pink spinel is highly prized for its brilliance and durability.

Field identification & locations

Identify by its octahedral crystal habit (when raw), high hardness, and lack of birefringence (it is singly refractive). Common locations include Myanmar, Sri Lanka, Tanzania, and Tajikistan.