mineral

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix

Hardness: 7 (Mohs); Color: Milky white to translucent quartz in a grey/green matrix; Luster: Vitreous to waxy; Structure: Hexagonal; Cleavage: None (conchoidal fracture).

Hardness: 7 (Mohs)
Color: Milky white to translucent quartz in a grey/green matrix
Luster: Vitreous to waxy

Identified May 2, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs); Color: Milky white to translucent quartz in a grey/green matrix; Luster: Vitreous to waxy; Structure: Hexagonal; Cleavage: None (conchoidal fracture).

Formation & geological history

Formed through hydrothermal precipitation where mineral-rich hot water flows through fractures in pre-existing rock, cooling and depositing silica over time.

Uses & applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as decorative architectural stone or collector specimens.

Geological facts

Quartz is the most abundant and diverse mineral on Earth's surface. Hydrothermal veins like these are often the primary source for gold and other precious metals.

Field identification & locations

Identify in the field by the white 'seam' cutting through darker rock; it will scratch glass and lacks cleavage. Commonly found in mountainous regions or areas with historical tectonic activity.

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Arenite (SiO2 based)

sedimentary

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Metamorphic

Epidote

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metamorphic

Nephrite Jade

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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

Metamorphic Rock

Green Apatite on Albite

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mineral