Mineral
Jasper
SiO2
AI-generated identification · may be incorrectHardness: 6.5-7. Color: Yellow, brown, red, green, or a combination. Luster: Vitreous to waxy. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.5-2.9.
- Hardness
- 6
- Color
- Yellow, brown, red, green, or a combination
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7. Color: Yellow, brown, red, green, or a combination. Luster: Vitreous to waxy. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.5-2.9.
Formation & geological history
Forms in sedimentary or metamorphic environments, often as nodules or concretions in limestone, dolomite, or shale.
Uses & applications
Used in jewelry, ornaments, and as a gemstone. Also has a history of use in tools and weapons.
Geological facts
Jasper is an opaque variety of chalcedony. It is often found with impurities that give it its distinctive colors and patterns.
Field identification & locations
Identify by its hardness, opaque appearance, and range of colors. Found globally, common in riverbeds and beaches.
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Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
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Septarian Pebble
Septarian nodule / Concretion
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Granite
Granite (Phaneritic intrusive igneous rock)
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