igneous
Dalmation Jasper
Dalmation Stone (perthitic feldspar with arfvedsonite)
Hardness: 5-7 on Mohs scale; Color: Cream, white, or pale gray with black or dark brown spots; Luster: Vitreous to dull; Structure: Microcrystalline; Specific Gravity: 2.58-2.91
- Hardness
- 5-7 on Mohs scale
- Color
- Cream, white, or pale gray with black or dark brown spots
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 5-7 on Mohs scale; Color: Cream, white, or pale gray with black or dark brown spots; Luster: Vitreous to dull; Structure: Microcrystalline; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through volcanic activity where magma cooled and solidified. It is primarily composed of feldspar and quartz, with the black spots being inclusions of arfvedsonite or other amphibole minerals. It is technically more of a 'stone' than a true jasper.
Uses & applications
Commonly used in jewelry (beads, cabochons), ornaments, tumbled stones for collectors, and in spiritual/metaphysical practices.
Geological facts
Despite its common name 'Dalmatian Jasper', it is actually an igneous rock rather than a sedimentary chalcedony (true jasper). It is named for its resemblance to the Dalmatian dog breed.
Field identification & locations
Identify by its unique 'spotted' appearance on a creamy background. It is almost exclusively found and mined in Chihuahua, Mexico. It is popular with collectors because it is easy to polish.
