gemstone

White Topaz (faceted)

Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)

AI-generated identification · may be incorrect

Hardness: 8.0 on Mohs scale. Color: Colorless. Luster: Vitreous (glassy). Crystal Structure: Orthorhombic. Cleavage: Perfect basal. Specific Gravity: 3.4-3.6. Cut: Brilliant-cut facets.

Hardness: 8
Color: Colorless
Luster: Vitreous (glassy)

Identified July 12, 2026More gemstone →

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Physical properties

Hardness: 8.0 on Mohs scale. Color: Colorless. Luster: Vitreous (glassy). Crystal Structure: Orthorhombic. Cleavage: Perfect basal. Specific Gravity: 3.4-3.6. Cut: Brilliant-cut facets.

Formation & geological history

Formed as a result of fluorine-bearing vapors given off during the last stages of crystallization in igneous rocks like granite and rhyolite, often found in pegmatites.

Uses & applications

Used primarily in jewelry as a more affordable alternative to diamond, as well as in industrial applications requiring high thermal and chemical stability.

Geological facts

Topaz is pleochroic, meaning it can show different colors in different crystal directions. Pure topaz is naturally colorless; the many colors found in nature are due to impurities or structural defects.

Field identification & locations

Identify in the field by its distinct hardness (8), high specific gravity, and perfect basal cleavage. Common localities include Brazil, Russia, and the United States (Texas/Utah).