sedimentary

Red Jasper with Quartz

Silicon Dioxide (SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Deep red to brownish-red with pale tan/greenish inclusions; Luster: Dull to vitreous; Crystal Structure: Microcrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Deep red to brownish-red with pale tan/greenish inclusions
Luster: Dull to vitreous

Identified July 18, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when fine particulate materials (silica-rich) are deposited in water or volcanic ash, followed by cementation or replacement of the original structure with chalcedony. The red color comes from iron impurities.

Uses & applications

Commonly used as a gemstone for jewelry, lapidary work (cabochons and tumbling), and as a grounding stone in metaphysical practices.

Geological facts

Red Jasper has been used since antiquity; it was known as the 'rain-bringer' in many ancient cultures and was mentioned in the Bible as one of the stones in the High Priest's breastplate.

Field identification & locations

Identify by its smooth texture, waxy or dull luster when unpolished, and the presence of opaque red color that does not transmit light. Often found in riverbeds, beaches, or areas with volcanic activity.