igneous
Dalmatian Jasper
Microcrystalline quartz with arfvedsonite and tourmaline inclusions
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, pale greenish-white or cream color with distinct black spots, vitreous luster, and opaque transparency.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, pale greenish-white or cream color with distinct black spots, vitreous luster, and opaque transparency.
Formation & geological history
Formed from igneous magma intrusion into surrounding rock, cooling slowly over millions of years.
Uses & applications
Commonly used in lapidary arts, tumbled stones, beaded jewelry, and decorative carvings.
Geological facts
Despite its trade name 'jasper', it is actually a microcrystalline quartz containing tourmaline or arfvedsonite spots.
Field identification & locations
Easily identified by its signature Dalmatian-dog-like black spots against a light greenish base; primarily sourced from Mexico.
