gemstone

Polished jasper pendant

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other mineral inclusions

AI-generated identification · may be incorrect

Opaque, polished reddish-brown and tan stone with subtle banding; vitreous to waxy luster, hardness about 6.5–7 Mohs, no visible cleavage, cryptocrystalline structure, and specific gravity near 2.6.

Identified September 14, 2026More gemstone →

Explore Polished jasper pendant in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement volcanic ash, sediments, or other rocks, with iron oxides producing red, orange, and brown colors. Deposits occur in many ages, commonly associated with volcanic and sedimentary terrains.

Uses & applications

Used for cabochons, pendants, beads, carvings, and decorative objects; its durability makes it suitable for jewelry and ornamental work.

Geological facts

“Jasper” is a broad trade and geological term rather than one single mineral species; patterns and colors vary greatly according to impurities and origin.

Field identification & locations

Identify it by its opacity, fine-grained texture, hardness, and lack of cleavage; it should not scratch easily with a steel blade and commonly leaves no streak on unglazed porcelain. Common sources include India, Madagascar, Brazil, Australia, and the western United States.