mineral
Variscite (in Matrix)
Hydrated aluminum phosphate (AlPO4·2H2O)
Hardness: 3.5-4.5; Color: Pale to apple green; Luster: Waxy to vitreous; Crystal structure: Orthorhombic; Specific gravity: 2.4-2.6
- Hardness
- 3
- Color
- Pale to apple green
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 3.5-4.5; Color: Pale to apple green; Luster: Waxy to vitreous; Crystal structure: Orthorhombic; Specific gravity: 2.4-2.6
Formation & geological history
Formed as a secondary mineral by the action of phosphate-charged surface waters on aluminous rocks, typically in arid environments. Often found in nodules or crusts within shale or limestone.
Uses & applications
Used primarily as a gemstone for cabochons, beads, and carvings. It is also a popular collector’s mineral due to its resemblance to turquoise.
Geological facts
Variously known as 'Utahlite' when found in Utah, USA. It is often confused with turquoise but lacks the copper content that gives turquoise its blue hues.
Field identification & locations
Identify by its waxy luster and distinct apple-green color against a tan or white host rock (matrix). Commonly found in Utah, Nevada, and Australia. Collectors look for high-contrast specimens between the green mineral and the matrix.
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