mineral
Red Jasper
Silicon Dioxide (SiO2) with iron inclusions
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs), Color: Reddish-brown with yellow banding, Luster: Vitreous to dull, Crystal Structure: Trigonal, Cleavage: None, Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs), Color: Reddish-brown with yellow banding, Luster: Vitreous to dull, Crystal Structure: Trigonal, Cleavage: None, Specific Gravity: 2.58-2.91
Formation & geological history
Formed from volcanic ash or fine-grained silica sediment that became saturated with iron minerals. Occurs typically in hydrothermal veins or as nodules in sedimentary rocks.
Uses & applications
Used primarily for lapidary work, jewelry (cabochons), interior decoration, and as a collector specimen.
Geological facts
Jasper is an aggregate of microcrystalline quartz. The red color is caused by iron (hematite) inclusions. It has been used for seals and jewelry since antiquity.
Field identification & locations
Identify by its smooth, waxy feel when polished, its opaque nature, and its red/brown streak. Common in river beds and desert environments globally.
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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
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Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary