sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, vibrant red color with white quartz or chalcedony banding, vitreous to dull luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58-2.91.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, vibrant red color with white quartz or chalcedony banding, vitreous to dull luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58-2.91.
Formation & geological history
Forms from silica-rich hydrothermal fluids or silica-rich sediments that precipitate out of solution, often accumulating in marine environments or volcanic settings and subsequently subjected to lithification and low-grade metamorphism.
Uses & applications
Widely used in lapidary arts, decorative carvings (such as this heart shape), jewelry, and as a collectible specimen.
Geological facts
Jasper has been used since ancient times for amulets, seals, and weaponry. Red jasper specifically was prized by ancient Egyptians who associated it with the blood of the goddess Isis.
Field identification & locations
Identified by its opaque red color, hardness capable of scratching glass, and smooth waxy polish when tumbled. Found globally, with notable deposits in India, Russia, Brazil, and the USA.
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