igneous
Dalmatian Jasper
Microcrystalline quartz feldspar composite with arfvedsonite or black tourmaline
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, cream to beige background with distinct black spots, vitreous luster, opaque crystal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, cream to beige background with distinct black spots, vitreous luster, opaque crystal structure.
Formation & geological history
Formed as an igneous intrusive rock, specifically a type of microgranite or pegmatite, originating from cooling magma bodies.
Uses & applications
Primarily used as a decorative stone, polished tumbled stone, and in lapidary jewelry making.
Geological facts
Despite its trade name 'jasper', geological testing reveals it is actually a feldspar-rich microgranite containing amphibole minerals.
Field identification & locations
Identified visually by its unmistakable cream-and-black spotted pattern resembling a Dalmatian dog; primarily sourced from Chihuahua, Mexico.
