igneous
Dalmatian Jasper (Dalmatian Stone)
Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)
Hardness: 5.5 - 7 (Mohs scale); Color: Pale gray, cream, or beige with black/dark spots; Luster: Dull to vitreous; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6 - 2.8
- Hardness
- 5
- Color
- Pale gray, cream, or beige with black/dark spots
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 5.5 - 7 (Mohs scale); Color: Pale gray, cream, or beige with black/dark spots; Luster: Dull to vitreous; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6 - 2.8
Formation & geological history
Formed through volcanic activity where magma cooled and crystallized. It is primarily found in Chihuahua, Mexico. The black spots are inclusions of tourmaline or arfvedsonite (amphibole) minerals embedded in a matrix of microcrystalline quartz and feldspar.
Uses & applications
Predominantly used as a decorative gemstone for jewelry (cabochons, beads, carvings), metaphysical healing purposes, and ornamental stone collecting.
Geological facts
Despite its trade name 'Dalmatian Jasper,' it is technically an igneous rock (aplite) rather than a true sedimentary jasper. The name comes from its resemblance to the spotted Dalmatian dog breed. It is often dyed various bright colors like blue, red, or green for marketing purposes.
Field identification & locations
Identify in the field by its distinct cream-to-beige base color with irregularly shaped black or dark brown spots distributed evenly. It feels smooth and cool to the touch. It is almost exclusively sourced from Mexico, appearing in volcanic outcrops.
