mineral

Lazulite

Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)

Hardness: 5.5 to 6; Color: Azure-blue, sky-blue, or bluish-green; Luster: Vitreous to dull; Crystal Structure: Monoclinic (often found as pyramids or masses); Cleavage: Indistinct; Specific Gravity: 3.0 to 3.1

Hardness: 5
Color: Azure-blue, sky-blue, or bluish-green
Luster: Vitreous to dull

Identified January 8, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in high-grade metamorphic rocks such as quartzite and in pegmatites through hydrothermal processes. It is often found in aluminum-rich environments.

Uses & applications

Used primarily as a minor gemstone and as a specimen for mineral collectors. Due to its vibrant color, it is sometimes used in decorative carvings or as an ornamental stone.

Geological facts

The name is derived from the Arabic word 'lazaward', meaning sky, referring to its distinct blue color. It is the official gemstone of the Yukon Territory in Canada.

Field identification & locations

Identified in the field by its intense blue color and association with quartzite. It can be distinguished from azurite by its lack of reaction to hydrochloric acid and from lapis lazuli by its higher hardness and crystal habit.

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