igneous
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
Hardness: 5-7 (Mohs scale); Color: Pale gray, cream, or beige with black/brown spots; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Specific Gravity: 2.5-2.7
- Hardness
- 5-7 (Mohs scale)
- Color
- Pale gray, cream, or beige with black/brown spots
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 5-7 (Mohs scale); Color: Pale gray, cream, or beige with black/brown spots; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Specific Gravity: 2.5-2.7
Formation & geological history
Formed during the cooling of peralkaline igneous melt, typically associated with volcanic environments where high-pressure cooling allows for the distinct spotted inclusion of Arfvedsonite.
Uses & applications
Primarily used as a gemstone for jewelry, beads, cabochons, and decorative carvings. Highly popular in the metaphysical and crystal collecting communities.
Geological facts
Despite being commonly called Dalmatian Jasper, it is not a jasper (sedimentary) but a peralkaline igneous rock containing quartz, feldspar, and spots of arfvedsonite.
Field identification & locations
Identified by its distinctive black tourmaline-like or arfvedsonite spots on a light background. Commonly found and sourced from Chihuahua, Mexico.
