mineral

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with inclusions

Hardness: 7 (Mohs scale); Color: White to grey with green/black veining; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to grey with green/black veining
Luster: Vitreous to greasy

Identified May 2, 2026More mineral →

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Physical properties

Formation & geological history

Formed from hydrothermal veins and igneous intrusions. The quartz crystallized from silica-rich fluids deep in the Earth's crust, often trapping minerals like chlorite or mica during the growth process.

Uses & applications

Decorative stone, landscape rock, high-quality quartz is used in jewelry and quartz-based glass manufacturing.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz gets its opaque color from microscopic fluid inclusions trapped during crystal growth.

Field identification & locations

Can be identified in the field by its hardness (it will easily scratch glass) and lack of cleavage. Commonly found in riverbeds, mountain ranges, and near volcanic sites worldwide.

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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Metamorphic Rock

Green Apatite on Albite

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mineral