Rock Identifier

mineral

Jasper

Silicon dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: variable (brown, red, green, yellow, black), Luster: vitreous to dull, Crystal structure: cryptocrystalline, Cleavage: none, Specific gravity: 2.5-2.9

Hardness: 6

Identified August 20, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: variable (brown, red, green, yellow, black), Luster: vitreous to dull, Crystal structure: cryptocrystalline, Cleavage: none, Specific gravity: 2.5-2.9

Formation & geological history

Formed from silica-rich fluids in sedimentary or volcanic environments, often with iron oxide inclusions.

Uses & applications

Used in jewelry, carving, and ornamental objects.

Geological facts

Jasper is an opaque variety of chalcedony. The name means 'spotted or speckled stone' and is derived from Old French 'jaspre'.

Field identification & locations

Identify by its opacity, hardness, and varied colors/patterns. Common worldwide, notable sources include India, Russia, USA, and Madagascar.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Calcite–fluorite mineral specimen with iron-oxide staining (Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides) — mineral

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Mineral Sand (Heavy Mineral Sand Concentrate) (Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite) — mineral

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Septarian Pebble (Septarian nodule / Concretion) — sedimentary

Septarian Pebble

Septarian nodule / Concretion

Soil with Mineral Detritus and Quartz Fragments (Regolith / Silicate Mineral Aggregate) — sedimentary

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate