sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to brownish-red
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58-2.91
Formation & geological history
Formed through the deposition of silica in cavities and fractures of sedimentary or volcanic rocks. The red color is caused by the presence of iron oxide (hematite) during the mineralization process. Can occur in rocks of nearly any geological age.
Uses & applications
Commonly used for lapidary work, jewelry (beads, cabochons), carvings, and energetic healing practices. Occasionally used for small ornamental accents in construction.
Geological facts
Jasper was a favorite gem in the ancient world; its name can be traced back in Arabic, Persian, Greek, and Latin. It is often referred to as a 'stone of endurance' or 'nurturer's stone' in metaphysical lore.
Field identification & locations
Identify by its opaque nature (it does not transmit light even at the edges), its deep red color, and lack of cleavage (conchoidal fracture). It is widely found in India, Brazil, USA, and South Africa.
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