sedimentary

Jasper-Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Hardness: 6.5-7 (Mohs scale); Color: Polychromatic (black, pink, white, yellow); Luster: Vitreous to waxy when polished; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.6-2.65

Hardness: 6
Color: Polychromatic (black, pink, white, yellow)
Luster: Vitreous to waxy when polished

Identified June 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the precipitation of silica from groundwater in cavities of igneous rocks or by the replacement of organic materials. This specimen appears to be an ornamental variety like Ocean Jasper or Fancy Jasper, typically formed in volcanic environments.

Uses & applications

Used primarily for lapidary work, jewelry (cabochons), interior decoration, and as a collector's specimen due to its aesthetic patterns.

Geological facts

Jasper is often considered 'the supreme nurturer' in metaphysical circles. It is physically dense and opaque, distinguishing it from chalcedony, though it often occurs with translucent agate inclusions as seen in this specimen.

Field identification & locations

Identify by its high hardness (cannot be scratched by a steel knife), smooth waxy feel when polished, and lack of transparency except in thin agate bands. Commonly found in riverbeds or volcanic regions like Madagascar, India, or the USA.

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