mineral

Quartz (Rutilated)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Hardness: 7 (Mohs scale), Color: Clear/translucent with gold or reddish needle-like inclusions, Luster: Vitreous, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified June 9, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal processes in pegmatites or metamorphic veins where titanium-rich minerals crystallize into needles within the cooling quartz crystal.

Uses & applications

Used primarily in jewelry as a gemstone, decorative carvings, and by crystal collectors for aesthetic and metaphysical purposes.

Geological facts

The needle-like inclusions are a mineral called rutile, often known as 'Venus hair' or 'Angel hair' quartz. It is unique because every specimen has a completely different internal pattern.

Field identification & locations

Identifiable by its glassy appearance and the presence of internal needle-shapped inclusions. Commonly found in Brazil, Madagascar, and the United States. Collectors look for high clarity and dense needle patterns.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic