sedimentary

Green Jasper

Microcrystalline Quartz (SiO2)

Hardness of 6.5-7 on the Mohs scale, deep green color, vitreous to dull luster, and conchoidal fracture with no visible crystal structure.

Identified October 30, 2026More sedimentary →

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Physical properties

Hardness of 6.5-7 on the Mohs scale, deep green color, vitreous to dull luster, and conchoidal fracture with no visible crystal structure.

Formed through the hydrothermal deposition of silica-rich fluids or precipitation in marine environments, often dating back over 500 million years.

Used primarily in lapidary arts for making cabochons, beads, decorative carvings, and small ornaments.

Jasper has been utilized since ancient times for amulets and seals due to its toughness and ability to take a high polish.

Identify by its waxy luster, hardness that scratches glass, and opaque green coloration; found worldwide in riverbeds and sedimentary deposits.

Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion

Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)