sedimentary/mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
Hardness: 6.5-7 (Mohs scale); Color: Brick red to deep maroon; Luster: Dull to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to deep maroon
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Brick red to deep maroon; Luster: Dull to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific gravity: 2.58-2.91
Formation & geological history
Formed in sedimentary or volcanic environments as silica-rich fluids permeate rock cavities or replace organic material. The red color is derived from iron impurities that oxidized during the lithification process over millions of years.
Uses & applications
Commonly used in jewelry for cabochons, beads, and carvings. Also used as an ornamental stone in home decor and by collectors for its healing folklore and grounding properties.
Geological facts
Red Jasper was widely used in ancient times as a sacred stone; it was known as the 'blood of Mother Earth' in some cultures and was used to make the seal of the 'King of the Gods' in Egypt.
Field identification & locations
Identified in the field by its opaque red color, smooth waxy texture when wet, and extreme hardness (it will scratch glass). Commonly found in riverbeds, deserts, and volcanic regions globally, including South Africa, Brazil, and the USA.
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