mineral

Quartz with Feldspar Veining

Silica (SiO2) with Potassium Feldspar (KAlSi3O8) inclusions

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)

Hardness: 7 (Quartz) to 6 (Feldspar) on Mohs scale
Color: Smoky grey to tan with creamy white/yellow bands
Luster: Vitreous to waxy

Identified July 20, 2026More mineral →

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Physical properties

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.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral

Nephrite Jade

Nephrite

Mineral/Rock