igneous
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock
Hardness: 5.5-7 (Mohs); Color: Pale gray, cream, or beige with black spots; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Specific gravity: ~2.6.
- Hardness
- 5
- Color
- Pale gray, cream, or beige with black spots
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 5.5-7 (Mohs); Color: Pale gray, cream, or beige with black spots; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Specific gravity: ~2.6.
Formation & geological history
Formed from igneous activity where magma cools slowly enough for perthitic textures to develop. The black spots are typically composed of arfvedsonite or other amphibole minerals, not tourmaline as often claimed. It is primarily sourced from Chihuahua, Mexico.
Uses & applications
Used extensively in the jewelry industry for beads, cabochons, and carvings. It is also a popular stone in the metaphysical and crystal collecting community for its unique appearance.
Geological facts
Despite being widely marketed as 'Dalmatian Jasper', it is not a true jasper because it lacks the high quartz content required for that classification. It is actually an igneous rock composed mainly of feldspar and quartz.
Field identification & locations
Identify by its distinctive 'spotted dog' appearance. Unlike synthetic stones, the black spots are irregular and embedded within the cream matrix. It is widely available at gem shows and metaphysical shops.
