Rock Identifier
Tumbled orange jasper (probable) (Microcrystalline quartz, SiO₂, colored chiefly by iron oxides) — mineral
mineral

Tumbled orange jasper (probable)

Microcrystalline quartz, SiO₂, colored chiefly by iron oxides

AI-generated identification · may be incorrect

Opaque orange-brown, earthy/waxy luster, irregular tumbled shape, and no visible cleavage; quartz hardness is about 7 Mohs and specific gravity about 2.6. The surface appears polished or naturally smoothed, though the image cannot confirm mineral identity definitively.

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Physical properties

Opaque orange-brown, earthy/waxy luster, irregular tumbled shape, and no visible cleavage; quartz hardness is about 7 Mohs and specific gravity about 2.6. The surface appears polished or naturally smoothed, though the image cannot confirm mineral identity definitively.

Formation & geological history

Jasper forms when silica-rich groundwater replaces or fills cavities and sediments, incorporating iron oxides that create orange-red coloration. It occurs in many ages and settings, commonly in volcanic or sedimentary environments.

Uses & applications

Used as a lapidary and ornamental stone for cabochons, carvings, beads, tumbled stones, and decorative objects; it has little industrial value.

Geological facts

Orange coloration commonly reflects hematite or goethite inclusions. It may be confused with orange aventurine, rhyolite, iron-rich chert, or dyed material.

Field identification & locations

Look for opaque color, fine grain, absence of visible individual crystals, and a glassy-to-waxy surface; a steel file should not easily scratch quartz-rich jasper. Common sources include India, Madagascar, Brazil, Australia, and the western United States.