igneous
Dalmation Jasper (Dalmation Stone)
Perthitic feldspar-quartz-amphibole rock
Hardness: 5.5-7 (Mohs); Color: Cream or white base with black/brown spots; Luster: Vitreous to waxy (when polished); Crystal Structure: Monoclinic/Triclinic; Cleavage: None (conchoidal fracture).
- Hardness
- 5
- Color
- Cream or white base with black/brown spots
- Luster
- Vitreous to waxy (when polished)
Identified More igneous →
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Physical properties
Hardness: 5.5-7 (Mohs); Color: Cream or white base with black/brown spots; Luster: Vitreous to waxy (when polished); Crystal Structure: Monoclinic/Triclinic; Cleavage: None (conchoidal fracture).
Formation & geological history
Formed through volcanic processes where magma cooled slowly, allowing crystals to form. The black spots are typically composed of arfvedsonite (amphibole) or tourmaline within the feldspar matrix.
Uses & applications
Primarily used in jewelry making (beads, cabochons), carvings, decorative ornaments, and widely for metaphysical or spiritual practices as a grounding stone.
Geological facts
Despite being called a 'Jasper' in the trade, it is technically an igneous rock composed of feldspar and quartz, not a traditional microcrystalline chalcedony jasper.
Field identification & locations
Identify by its distinctive black-on-white speckled appearance that mimics a Dalmatian dog breed. Commonly found in Chihuahua, Mexico. It is easily distinguishable in the field by its hardness and unique spotted patterns.
