mineral

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Translucent white to pale yellowish; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: Translucent white to pale yellowish
Luster: Vitreous to greasy

Identified April 4, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Translucent white to pale yellowish; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed from silica-rich hydrothermal fluids cooling in veins, or within igneous and metamorphic rocks. This specific specimen has been carved and polished into a star shape.

Uses & applications

Used primarily for decorative purposes, carving, and as a pocket stone or meditation aid in the metaphysical community.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this one often show a 'greasy' luster due to microscopic inclusions or the polishing process.

Field identification & locations

Identify in the field by its hardness (ability to scratch glass) and lack of cleavage. Common in many geological environments globally but often found in hydrothermal veins.

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