mineral
Quartz (Sunstone-like Chalcedony)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 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
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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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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Tumbled granite
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
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Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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