sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Deep reddish-brown to terra cotta; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline/cryptocrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Deep reddish-brown to terra cotta
Luster: Vitreous to dull

Identified May 5, 2026More sedimentary →

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Physical properties

Formation & geological history

Forms through the deposition of silica from water containing iron oxides and other impurities, often in volcanic or sedimentary environments. This specimen shows signs of beach erosion and stream tumbling.

Uses & applications

Used primarily for jewelry (cabochons), lapidary art, decorative ornaments, and as a popular stone for metaphysical or collector purposes.

Geological facts

The red color is specifically caused by the presence of iron oxide (hematite). In antiquity, it was known as the 'mother of all stones' and has been used for seals and amulets for thousands of years.

Field identification & locations

Identify in the field by its smooth, waxy texture, opaque appearance, and resistance to scratching. It is commonly found in gravel beds, riverbanks, and beaches along the Pacific Coast of North America.