igneous
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
Mohs hardness of 5-7, dull to vitreous luster, opaque, white-to-cream background with black-to-brown spots of Arfvedsonite.
Identified More igneous →
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Physical properties
Mohs hardness of 5-7, dull to vitreous luster, opaque, white-to-cream background with black-to-brown spots of Arfvedsonite.
Formation & geological history
Formed from volcanic eruptions where cooling magma allows the formation of quartz and feldspar crystals, interspersed with small concentrations of the amphibole mineral Arfvedsonite.
Uses & applications
Primarily used for decorative purposes, including beads, cabochons, carvings, and tumbled stones for jewelry and metaphysical collections.
Geological facts
Despite its trade name 'Dalmatian Jasper', it is not actually a jasper or a sedimentary rock, but rather an igneous rock composed mainly of feldspar and quartz.
Field identification & locations
Identified by its distinctive black spots on a white-cream background, resembling a Dalmatian dog's coat. It is primarily found in Chihuahua, Mexico.
