sedimentary
Green Jasper Conglomerate
Silica-cemented polymictic conglomerate
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, green and white mottled color with a waxy to vitreous luster, cryptocrystalline structure with rounded quartz pebbles.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, green and white mottled color with a waxy to vitreous luster, cryptocrystalline structure with rounded quartz pebbles.
Formation & geological history
Formed through the accumulation and subsequent lithification of rounded mineral clasts and quartz pebbles in ancient riverbeds or marine environments.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, and as a polished collector specimen.
Geological facts
The green coloration is typically imparted by microscopic inclusions of iron-rich silicates or chromium within the microcrystalline quartz matrix.
Field identification & locations
Identify by its distinctive rounded pebble inclusions embedded in a green chert matrix; commonly found in glacial drift and alluvial gravel beds.
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