mineral
Quartz with Mica/Schist inclusion
Silicon Dioxide (SiO2) with Phyllosilicates
Hardness: 7 (Quartz component); Color: White to translucent milky quartz with dark gray to black inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal (Quartz); Specific Gravity: ~2.65
- Hardness
- 7 (Quartz component)
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 (Quartz component); Color: White to translucent milky quartz with dark gray to black inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal (Quartz); Specific Gravity: ~2.65
Formation & geological history
Formed in pegmatites, hydrothermal veins, or metamorphic rock host environments where quartz crystallized alongside dark mica (biotite) or amphibole/schist matrix.
Uses & applications
Primarily collected as a decorative specimen or mineral sample, occasionally used in lapidary work.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. Inclusion-rich specimens record the complex thermal and chemical history of the fluids from which they grew.
Field identification & locations
Can be identified in the field by its hardness (scratches glass), glassy to milky luster, and distinct glassy cleavage-less fracture on the quartz parts contrasting with dark mineral inclusions. Found worldwide in granitic terrains.
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