Dalmatian Stone

Physical Properties

Hardness: 5.5-7 (Mohs); Color: Pale gray, cream, or beige with distinctive black spots; Luster: Dull to vitreous; Crystal Structure: Monoclinic (feldspar dominance); Cleavage: Uneven to conchoidal; Specific Gravity: 2.6

Formation & Geological History

Formed from igneous activity where magma slowly cools, leading to the crystallization of feldspar and quartz (the white/gray groundmass) with inclusions of Arfvedsonite (the black spots). Most specimens are found in Chihuahua, Mexico.

Uses & Applications

Primarily used in jewelry (beads, cabochons), small ornamental carvings, and widely sold as a pocket stone or tumbled stone in the metaphysical market.

Geological Facts

Despite its common trading name 'Dalmatian Jasper', it is not actually a jasper (which is microcrystalline quartz). It is technically an igneous rock primarily composed of feldspars and quartz. The black spots are minerals from the amphibole group, specifically arfvedsonite, rather than tourmaline as often misreported.

Field Identification & Locations

Identify by its unique spotted appearance resembling a Dalmatian dog. In the field, look for a fine-grained, light-colored matrix with sharply defined black dots. It is almost exclusively mined in Mexico.

Identified on: 4/16/2026

Mode: Standard