Igneous

Dalmatian Stone (Dalmatian Jasper)

Dalmatian Stone (A variety of Perthite / Aplite)

Hardness: 5.5-7 (Mohs scale); Color: Cream to pale gray with distinct black or brown spots; Luster: Vitreous to dull; Crystal structure: Monoclinic; Cleavage: Good to perfect (in feldspar components); Specific gravity: 2.5-2.7

Hardness: 5
Color: Cream to pale gray with distinct black or brown spots
Luster: Vitreous to dull

Identified March 15, 2026More igneous →

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Physical properties

Formation & geological history

Formed from molten magma cooling underground. The white/cream base is composed largely of feldspars (albite and orthoclase) and quartz, while the black spots were previously thought to be tourmaline but are now identified as arfvedsonite (amphibole).

Uses & applications

Primarily used in the jewelry industry for beads, cabochons, and carvings. It is popular in the metaphysical and gemstone collecting community.

Geological facts

Despite being widely marketed as 'Dalmatian Jasper', it is not a sedimentary jasper but actually an igneous rock. It is named after the Dalmatian dog breed due to its spotted appearance.

Field identification & locations

Identify in the field by its unique 'salt and pepper' look where the black inclusions are clearly defined against a light background. Primarily found in Chihuahua, Mexico. Collectors should look for high contrast between the spots and the matrix.

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