igneous
Dalmatian Jasper
Microcrystalline Quartz with Tourmaline
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, cream to off-white base color with distinct black or dark brown spots, vitreous to dull luster, and cryptocrystalline 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 or dark brown spots, vitreous to dull luster, and cryptocrystalline structure.
Formation & geological history
Formed from igneous or hydrothermal processes where quartz-rich solutions intruded into and mingled with dark mineral-rich host rocks, often millions of years old.
Uses & applications
Used primarily in lapidary arts, tumbled stones, beaded jewelry, and ornamental carvings.
Geological facts
Despite its trade name, Dalmatian Jasper is not technically a true jasper, but rather a feldspar-quartz rock speckled with arfvedsonite or black tourmaline.
Field identification & locations
Easily identified by its characteristic Dalmatian-dog-like black spots on a pale background, commonly sourced primarily from Chihuahua, Mexico.
