gemstone
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
Hardness: 7; Color: Colorless/transparent; Luster: Vitreous; Crystal structure: Trigonal (often cut into faceted shapes); Cleavage: None
- Hardness
- 7
- Color
- Colorless/transparent
- Luster
- Vitreous
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Physical properties
Hardness: 7; Color: Colorless/transparent; Luster: Vitreous; Crystal structure: Trigonal (often cut into faceted shapes); Cleavage: None
Formation & geological history
Forms in igneous, metamorphic, and sedimentary rocks, often from silica-rich hydrothermal fluids or cooling pegmatites.
Uses & applications
Used in jewelry, decorative items, optics, electronics (oscillators), and glassmaking.
Geological facts
Clear quartz is one of the most abundant minerals on Earth's surface and is often used as a diamond simulant when faceted.
Field identification & locations
Identify by hardness (scratches glass), lack of cleavage, and conchoidal fracture. Common worldwide.
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Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
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Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (or possibly Diamond)
Zirconium dioxide (or Carbon)
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Faceted Gemstone
Unknown transparent mineral, possibly Diamond (C), Cubic Zirconia (ZrO2), Quartz (SiO2), or Glass
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