igneous
Dalmatian Jasper
Feldspar-Quartz Microgranite
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, cream to off-white base color with distinct black spots of arfvedsonite or tourmaline, vitreous luster, and microcrystalline crystal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, cream to off-white base color with distinct black spots of arfvedsonite or tourmaline, vitreous luster, and microcrystalline crystal structure.
Formation & geological history
Formed from cooling and solidifying igneous magma, specifically as a microgranite or quartz-feldspar porphyry, primarily found in Mexico.
Uses & applications
Commonly used for lapidary work, making polished stones, tumbled stones, beads, and ornamental jewelry.
Geological facts
Despite its trade name containing 'jasper', it is scientifically not a true jasper, which is typically a microcrystalline quartz variety.
Field identification & locations
Easily identified by its signature pale cream background peppered with contrasting black amphibole or tourmaline spots. Commonly sourced from the state of Chihuahua, Mexico.
