mineral

Quartz crystal

Quartz (Silicon dioxide, SiO2)

Hardness 7. Clear or white color with vitreous luster. Hexagonal crystal structure with conchoidal fracture.

Identified August 11, 2026More mineral →

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Physical properties

Hardness 7. Clear or white color with vitreous luster. Hexagonal crystal structure with conchoidal fracture.

Formed from silica-rich solutions in hydrothermal veins or pegmatites. Found worldwide in all rock types.

Used in electronics, optics, jewelry, and as an abrasive. Popular among collectors.

Quartz is the second most abundant mineral in Earth's continental crust. It exhibits piezoelectric properties.

Identified by its hexagonal shape, hardness (scratches glass), and lack of cleavage. Common in many geological environments.

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

Septarian Pebble

Septarian nodule / Concretion

Limonite / Goethite (Iron Ore Mineral nodule)

FeO(OH)·nH2O / FeO(OH)