Dalmatian Stone

Physical Properties

Hardness: 5-7 (Mohs scale); Color: Creamy white to pale gray with black or dark brown spots; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None.

Formation & Geological History

Formed from molten silica within the Earth's crust that cooled slowly. The black spots are typically composed of sodic amphiboles like arfvedsonite. It is primarily found in Chihuahua, Mexico.

Uses & Applications

Primarily used for decorative purposes, lapidary work (cabochons, beads), carving, and within the metaphysical community as 'Dalmatian Jasper'.

Geological Facts

Despite its trade name 'Dalmatian Jasper', it is technically an igneous rock (aplite or perthite) rather than a true sedimentary jasper. The black spots were long thought to be tourmaline, but are actually iron-rich arfvedsonite.

Field Identification & Locations

Identify by its distinctive white-to-cream matrix and irregular high-contrast black spots. It is almost exclusively mined in Mexico. Collectors should look for even distribution of spots and high polishing quality.

Identified on: 4/21/2026

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