mineral
Variscite
Variscite (AlPO4·2H2O)
Hardness of 3.5 to 4.5 on the Mohs scale, typically green, bluish-green, or pale blue with brownish matrix webs (often resembling turquoise), vitreous to waxy luster, orthorhombic crystal system, specific gravity of 2.2 to 2.6.
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Physical properties
Hardness of 3.5 to 4.5 on the Mohs scale, typically green, bluish-green, or pale blue with brownish matrix webs (often resembling turquoise), vitreous to waxy luster, orthorhombic crystal system, specific gravity of 2.2 to 2.6.
Formation & geological history
Formed as a secondary mineral by the direct action of phosphate-bearing solutions on aluminum-rich rocks in low-temperature hydrothermal environments or weathering zones.
Uses & applications
Used primarily as an ornamental stone, for making cabochons, beads, and inlay work in jewelry, as well as a sought-after collector specimen.
Geological facts
Variscite was first described in 1837 and named after Variscia, the historical German name for the Vogtland district where it was originally found. It is frequently confused with turquoise due to its similar color, though variscite contains aluminum phosphate rather than copper and aluminum phosphate.
Field identification & locations
Identified by its distinctive green-to-blue coloration often webbed with dark matrix lines, and its softness compared to quartz. Common localities include Utah (USA), Nevada, Australia, Germany, and Poland.
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