sedimentary
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
Hardness: 6.5-7 (Mohs scale), Color: Yellow, orange with dark dendritic streaks, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Yellow, orange with dark dendritic streaks, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture
Formation & geological history
Formed primarily from the deposition of silica from water or hydrothermal solutions, often in volcanic environments or sedimentary beds. The coloration comes from iron oxides and various mineral inclusions.
Uses & applications
Used extensively in jewelry as cabochons, for decorative ornamental carvings, and as a popular specimen for rock tumbling and metaphysical collections.
Geological facts
Jasper was a favorite gem in the ancient world; its name can be traced back in Arabic, Persian, Hebrew, Assyrian, Greek, and Latin. It is an opaque variety of chalcedony.
Field identification & locations
Identify by its hardness (cannot be scratched by a steel knife), opaque nature, and smooth, almost plastic-like waxy feel when polished. Commonly found in riverbeds and desert environments globally.
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