mineral

Cloudy Quartz / Quartz Tumble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Translucent white to lavender/greyish. Luster: Vitreous/Glassy. Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Translucent white to lavender/greyish
Luster: Vitreous/Glassy

Identified March 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed from the crystallization of silica-rich magma or via hydrothermal activity in veins. Quartz is found in almost all geological ages and environments, particularly in igneous and metamorphic rocks.

Uses & applications

Commonly used in crystal healing, home decor, and tumbled for beginner geology collections. High-purity quartz is used in glassmaking and electronics (piezoelectric properties).

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. When purple, it is called Amethyst, and when milky white, it is called Milky Quartz; the specimen in the image appears to be a tumbled fragment of translucent quartz with some light scattering.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and vitreous luster. Commonly found worldwide in riverbeds, mountains, and mines. Collectors often find these as 'pocket stones.'