mineral

Red Jasper

Silicon Dioxide (SiO2) - variety Jasper

Hardness: 6.5-7 on Mohs scale; Color: Deep red due to iron inclusions; Luster: Vitreous to dull; Crystal structure: Trigonal (Microcrystalline); Cleavage: None; Fracture: Conchoidal.

Hardness: 6
Color: Deep red due to iron inclusions
Luster: Vitreous to dull

Identified May 7, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Deep red due to iron inclusions; Luster: Vitreous to dull; Crystal structure: Trigonal (Microcrystalline); Cleavage: None; Fracture: Conchoidal.

Formation & geological history

Formed primarily in sedimentary environments or through volcanic activity where silica-rich fluids permeate porous rocks or volcanic ash, eventually crystallizing as microcrystalline quartz.

Uses & applications

Used extensively in jewelry for cabochons and beads, as an ornamental stone for carvings, and as a collector's specimen.

Geological facts

The red color is caused by trace amounts of hematite (iron oxide). It was considered a sacred stone by several ancient civilizations and was often used in amulets for protection.

Field identification & locations

Identify by its characteristic red color, high hardness (cannot be scratched by a steel nail), and lack of transparency (it is opaque). Common in desert regions and riverbeds.