mineral
Jasper
Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 on Mohs scale. Color: Brown, red, orange, yellow, green, or a combination. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.5-2.9.
- Hardness
- 6
- Color
- Brown, red, orange, yellow, green, or a combination
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Brown, red, orange, yellow, green, or a combination. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.5-2.9.
Formation & geological history
Formed from silica-rich fluids that percolate through rocks and deposit silica in cavities and fractures. Often associated with volcanic activity and hydrothermal environments.
Uses & applications
Commonly used in jewelry, lapidary arts, and as a decorative stone. Also has historical significance in various cultures for its believed healing properties.
Geological facts
Jasper is an opaque variety of chalcedony. The name 'jasper' means 'spotted or speckled stone'. It has been used since antiquity for ornaments and seals.
Field identification & locations
Identify by its opaque nature, hardness, and wide range of colors and patterns. Commonly found worldwide, with notable deposits in the USA, India, Russia, and Madagascar.
