gemstone
Faceted Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness: 7.0; Color: Clear/Colorless; Luster: Vitreous; Crystal Structure: Trigonal (faceted cut); Specific Gravity: 2.65
- Hardness
- 7
- Color
- Clear/Colorless
- Luster
- Vitreous
Identified More gemstone →
Explore Faceted Clear Quartz (Rock Crystal) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness: 7.0; Color: Clear/Colorless; Luster: Vitreous; Crystal Structure: Trigonal (faceted cut); Specific Gravity: 2.65
Formation & geological history
Formed in igneous pegmatites, hydrothermal veins, and metamorphic rocks. Most specimens are millions of years old, crystalline growth occurring as silica-rich water cools.
Uses & applications
Used extensively in jewelry as a gemstone, in crystal healing practices, as watch oscillators, and in the manufacturing of glass and ceramics.
Geological facts
Quartz is the most abundant and diverse mineral on Earth's surface. Transparent clear quartz has been used since antiquity for lenses and decorative objects known as 'rock crystal'.
Field identification & locations
Identify by its hardness (will scratch glass), lack of cleavage, and exceptional clarity. It is common worldwide, with major deposits in Brazil and Arkansas, USA.
More like this
Other gemstone specimens
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone
Amber
Succinite (Organic Gemstone)
mineral