sedimentary or metamorphic

Jasper and Quartzite mix

Silicon Dioxide (SiO2) with impurities

Hardness of 6.5-7 on the Mohs scale. Opaque to translucent luster, predominantly white and greenish-grey coloring with a waxy or dull waxy surface texture. Cryptocrystalline structure.

Identified March 8, 2026More sedimentary or metamorphic →

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Physical properties

Hardness of 6.5-7 on the Mohs scale. Opaque to translucent luster, predominantly white and greenish-grey coloring with a waxy or dull waxy surface texture. Cryptocrystalline structure.

Formation & geological history

Formed through the accumulation of silica in sedimentary environments or the metamorphism of quartz-rich sandstone. These materials often date back millions of years and occur in areas with significant geological activity or ancient sea beds.

Uses & applications

Used primarily for decorative purposes, lapidary work (cabs and beads), landscaping, and as a durable construction aggregate for roads and foundations in its raw form.

Geological facts

Jasper is often referred to as the 'Supreme Nurturer.' It is a form of chalcedony that contains up to 20% foreign materials which determine its unique color and patterns. This specific specimen appears to be water-worn or weathered, giving it a rounded, river-rock appearance.

Field identification & locations

Commonly found in riverbeds, glacial deposits, and gravel pits. To identify in the field, use a scratch test (it should scratch glass but not be scratched by a steel knife) and look for a conchoidal fracture pattern. Collectors should look for unique banding or vivid color contrast.

Other sedimentary or metamorphic specimens

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Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Sedimentary or Metamorphic (low-grade)

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

metamorphic

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

mineral

Anthracite Coal

Anthracite (Carbon-based sedimentary-derived metamorphic rock)

metamorphic

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

sedimentary

River Pebbles and Quartz

Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)

mixed