mineral
Jasper (or possibly Agate/Chalcedony) beads
SiO2 (Silicon Dioxide)
AI-generated identification · may be incorrectHardness: 6.5-7 on Mohs scale. Color: Dark green to blackish with mottling. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Dark green to blackish with mottling
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Dark green to blackish with mottling. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.91.
Formation & geological history
Formed in hydrothermal veins, volcanic rocks, or sedimentary deposits as secondary silica precipitation.
Uses & applications
Commonly used in jewelry making, specifically for beaded bracelets and necklaces.
Geological facts
Jasper is an opaque, impure variety of silica, usually red, yellow, brown or green in color.
Field identification & locations
Identified by its hardness (scratches glass), opacity, and lack of cleavage. Common worldwide.
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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
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
Septarian Pebble
Septarian nodule / Concretion
sedimentary