sedimentary

Red Jasper (Microcrystalline Quartz)

SiO2 (Silicon Dioxide) with Iron Oxide inclusions

Hardness: 6.5-7 on Mohs scale; Color: Terracotta red to deep brownish-red; Luster: Dull to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Terracotta red to deep brownish-red
Luster: Dull to waxy

Identified April 6, 2026More sedimentary →

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Physical properties

Formation & geological history

Forms when fine-grained silica-rich fluids permeate sedimentary or volcanic rocks, often depositing alongside iron oxides which provide the red pigment. It frequently forms in marine environments and is consolidated through high pressure over millions of years.

Uses & applications

Extensively used for decorative purposes, lapidary arts, jewelry (cabochons and beads), and as an ornamental stone in mosaics or architecture. Historically used for making tools and seals.

Geological facts

Jasper was a favorite gem in the ancient world; its name can be traced back in Arabic, Persian, Hebrew, Assyrian, Greek, and Latin. It is often referred to as the 'Supreme Nurturer' in metaphysical circles.

Field identification & locations

Identified in the field by its opaque red color, smoothness when water-worn, and hardness (it will scratch glass). It is commonly found in gravel beds of rivers or in coastal areas, particularly in India, Russia, Brazil, and the Southwestern USA.

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