sedimentary
Fancy Jasper
Silicon Dioxide (SiO2)
Hardness: 6.5-7 Mohs; Color: Multicolored (red, green, brown, mauve); Luster: Vitreous to waxy (when polished); Crystal Structure: Prismatic (microcrystalline); Cleavage: None (conchoidal fracture).
- Hardness
- 6
- Color
- Multicolored (red, green, brown, mauve)
- Luster
- Vitreous to waxy (when polished)
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Physical properties
Hardness: 6.5-7 Mohs; Color: Multicolored (red, green, brown, mauve); Luster: Vitreous to waxy (when polished); Crystal Structure: Prismatic (microcrystalline); Cleavage: None (conchoidal fracture).
Formation & geological history
Formed through the deposition of silica from water in cavities of volcanic rocks or sedimentary environments. Most specimens range from the Mesozoic to Cenozoic eras.
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), metaphysical practices, and decorative ornaments.
Geological facts
The name Jasper is derived from the Greek word 'iaspis', meaning 'spotted stone'. Bloodstone is a specific variety of dark green jasper with red inclusions.
Field identification & locations
Identify in the field by its opacity and multicolored swirling or banded patterns. Commonly found in India, Brazil, and South Africa.
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