igneous
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
Hardness: 5.5–7; Color: Creamy white to pale gray background with black to brown spots; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58–2.91
- Hardness
- 5
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 5.5–7; Color: Creamy white to pale gray background with black to brown spots; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58–2.91
Formation & geological history
Formed from the solidification of silica-rich magma (aplite) where black spots of Arfvedsonite crystals grew within a matrix of quartz and feldspar; commonly associated with the Mesozoic era.
Uses & applications
Primarily used in jewelry (beads, cabochons), decorative carvings, pocket stones for collectors, and in metaphysical practices as a 'grounding' stone.
Geological facts
Although often marketed as 'Dalmatian Jasper', it is not a true jasper (sedimentary) but rather an igneous rock featuring black spots of the amphibole mineral Arfvedsonite rather than Tourmaline as previously thought.
Field identification & locations
Identify by its distinctive 'dog-like' spotted pattern and high hardness (cannot be scratched by a copper penny or steel knife easily). Found primarily in Chihuahua, Mexico. Collectors should look for high contrast between the cream base and dark spots.
