mineral

Hemimorphite

Hemimorphite (Zn4Si2O7(OH)2·H2O)

Hardness of 4.5-5 on the Mohs scale, vibrant sky blue to teal color, vitreous to adamantine luster, orthorhombic crystal system, perfect cleavage on one direction, specific gravity around 3.4-3.5.

Identified July 31, 2026More mineral →

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Physical properties

Hardness of 4.5-5 on the Mohs scale, vibrant sky blue to teal color, vitreous to adamantine luster, orthorhombic crystal system, perfect cleavage on one direction, specific gravity around 3.4-3.5.

Formation & geological history

Formed as a secondary mineral in the oxidized zones of zinc and lead ore deposits, often associated with smithsonite, anglesite, and cerussite.

Uses & applications

Used primarily as a collector's mineral specimen, and occasionally cut into cabochons for artisan jewelry.

Geological facts

Hemimorphite gets its name from the hemimorphic development of its crystals, meaning the crystals terminate with dissimilar faces at opposite ends.

Field identification & locations

Can be identified by its distinctive robin's egg blue color, association with zinc ores, and crystal habit when well-formed. Commonly sourced from Mexico, China, and the Congo.