mineral
Quartz with Feldspar Veining
Silica (SiO2) with Potassium Feldspar (KAlSi3O8) inclusions
AI-generated identification · may be incorrectHardness: 7 (Quartz) to 6 (Feldspar) on Mohs scale; Color: Smoky grey to tan with creamy white/yellow bands; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture)
- Hardness
- 7 (Quartz) to 6 (Feldspar) on Mohs scale
- Color
- Smoky grey to tan with creamy white/yellow bands
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Quartz) to 6 (Feldspar) on Mohs scale; Color: Smoky grey to tan with creamy white/yellow bands; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture)
Formation & geological history
Formed via hydrothermal processes or in pegmatitic environments where mineral-rich hot fluids crystallize in cracks of cooling igneous bodies. These specimens often date to the Precambrian or Paleozoic eras.
Uses & applications
Primarily collected as display specimens; high-purity quartz is used in glassmaking, electronics, and abrasives. This specific piece is a hobbyist garden or field find.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The banding seen here represents different pulses of mineral deposition within a single hydrothermal vein.
Field identification & locations
Identified in the field by its hardness (scratches glass), waxy luster, and lack of true cleavage planes. Commonly found in mountainous regions or creek beds near igneous outcrops.
