sedimentary
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
Hardness: 6.5-7 (Mohs scale); Color: Olive to forest green with reddish-brown oxidation; Luster: Dull or waxy; Crystal Structure: Microcrystalline; Specific Gravity: 2.6-2.9
- Hardness
- 6
- Color
- Olive to forest green with reddish-brown oxidation
- Luster
- Dull or waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Olive to forest green with reddish-brown oxidation; Luster: Dull or waxy; Crystal Structure: Microcrystalline; Specific Gravity: 2.6-2.9
Formation & geological history
Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments, typically in low-temperature hydrothermal environments during the Paleozoic or Mesozoic eras.
Uses & applications
Used primarily for lapidary work, jewelry making (cabochons), energetic healing practices, and as decorative landscape stones.
Geological facts
Jasper is an opaque variety of chalcedony. The green color in this specific specimen is often caused by the presence of minerals like chlorite or actinolite within the silica matrix.
Field identification & locations
Can be identified by its opacity (it does not transmit light even on thin edges), high hardness (cannot be scratched by a steel knife), and smooth, conchoidal fracture. Often found in riverbeds and coastal areas.
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