sedimentary
Jasper and Quartz conglomerate
Silicified conglomerate / Quartz-jasper breccia
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, waxy to vitreous luster, opaque to translucent with red and gray mottling, conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, waxy to vitreous luster, opaque to translucent with red and gray mottling, conchoidal fracture.
Formation & geological history
Formed through the cementation of mineral grains and rock fragments in ancient marine or terrestrial depositional environments.
Uses & applications
Used primarily in lapidary arts for cabochons, carvings, ornamental landscaping stone, and collected by rockhounds.
Geological facts
The vibrant red colors are caused by iron oxide inclusions within the microcrystalline quartz matrix.
Field identification & locations
Identified by its high hardness, inability to be scratched by steel, and distinct red and gray mottled patterning. Commonly found in riverbeds and glacial drift.
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