sedimentary

Jasper (specifically Oolitic or Brecciated Jasper)

Silicon Dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Dark reddish-brown with cream and tan inclusions; Luster: Vitreous to waxy (especially when wet); Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6-2.9.

Hardness: 6
Color: Dark reddish-brown with cream and tan inclusions
Luster: Vitreous to waxy (especially when wet)

Identified April 21, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water. The reddish color comes from iron oxides. Often found as water-worn nodules in riverbeds or coastal areas where ancient sedimentary layers have eroded.

Uses & applications

Used primarily for ornamental purposes, lapidary arts (cabochons, beads), and as a collector's specimen. Known as a 'nurturing stone' in metaphysical communities.

Geological facts

Jasper is an opaque variety of chalcedony. The name 'Jasper' is derived from the Greek 'iaspis', meaning spotted stone, referring to its typically variegated appearance.

Field identification & locations

Identify by its hardness (it will scratch glass) and its opaque, waxy appearance. Commonly found in gravel pits or along stony beaches and river banks where silica-rich rocks are present.