mineral
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: variable (brown, red, green, yellow, black), Luster: vitreous to dull, Crystal structure: cryptocrystalline, Cleavage: none, Specific gravity: 2.5-2.9
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: variable (brown, red, green, yellow, black), Luster: vitreous to dull, Crystal structure: cryptocrystalline, Cleavage: none, Specific gravity: 2.5-2.9
Formation & geological history
Formed from silica-rich fluids in sedimentary or volcanic environments, often with iron oxide inclusions.
Uses & applications
Used in jewelry, carving, and ornamental objects.
Geological facts
Jasper is an opaque variety of chalcedony. The name means 'spotted or speckled stone' and is derived from Old French 'jaspre'.
Field identification & locations
Identify by its opacity, hardness, and varied colors/patterns. Common worldwide, notable sources include India, Russia, USA, and Madagascar.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous