igneous
Dalmation Stone
Dalmation Jasper (Igneous microcrystalline quartz with arfvedsonite)
Hardness: 5.5-7 (Mohs scale); Color: Creamy white to pale gray with black or dark brown spots; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Specific Gravity: 2.58-2.91
- Hardness
- 5
- Color
- Creamy white to pale gray with black or dark brown spots
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 5.5-7 (Mohs scale); Color: Creamy white to pale gray with black or dark brown spots; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Specific Gravity: 2.58-2.91
Formation & geological history
Formed from the cooling of magma or lava that contains high amounts of silica. The black spots are inclusions of the mineral arfvedsonite. It is primarily found in Chihuahua, Mexico.
Uses & applications
Commonly used in the jewelry industry for beads, cabochons, and tumbled stones. Frequently used in metaphysical practices and as a decorative stone in mosaics or crafts.
Geological facts
Despite being called 'Dalmation Jasper', it is not actually a jasper (which is sedimentary) but an igneous rock. It was named for its resemblance to the Dalmation breed of dog.
Field identification & locations
Identify by its distinctive black tourmaline or arfvedsonite spots on a light background and its smooth, waxy texture when polished. Most specimens on the market originate from Mexico.
