mineral
Yellow Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs scale); Color: Mustard yellow, golden brown; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Mustard yellow, golden brown
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Mustard yellow, golden brown; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed from silica-rich hydrothermal fluids or through the silicification of volcanic ash or sediments. The yellow color is caused by the presence of Goethite or Limonite (iron oxide) inclusions during formation.
Uses & applications
Commonly used for lapidary work, jewelry (beads, cabochons), tumbled stones for crystal healing, and as an ornamental stone in polished form.
Geological facts
Jasper is a variety of chalcedony that is opaque due to its high mineral content (up to 20% foreign material). Traditionally known as 'the supreme nurturer' in metaphysical circles.
Field identification & locations
Identify by its opacity (unlike translucent agate) and its smooth, waxy texture when polished. Found globally, with significant deposits in India, Brazil, Australia, and the western United States.
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Epidote
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Mineral
Nephrite Jade
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