mineral

Quartz (Sunstone-like Chalcedony)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Tan to pale peach with a waxy luster; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Tan to pale peach with a waxy luster

Identified June 9, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Tan to pale peach with a waxy luster; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed via precipitation of silica-rich fluids in volcanic rock cavities or sedimentary environments. This specimen appears to be a small water-worn grain which can range from millions to billions of years old.

Uses & applications

Large, high-quality specimens are used for semi-precious jewelry, carving, and industrial abrasives. As a small grain, it has primarily educational or collecting value for beginners.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is chemically and physically resistant to weathering, which is why it often remains as small grains after other minerals have eroded away.

Field identification & locations

Identified by its waxy luster, hardness (it will scratch glass), and lack of cleavage. Likely found in riverbeds, beaches, or within gravel deposits.

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