igneous
Dalmatian Stone
Aplite (often incorrectly called Dalmatian Jasper)
Hardness: 6-7.5 (Mohs scale); Color: White, cream, or light grey background with black spots; Luster: Dull to vitreous; Crystal Structure: Microcrystalline; Cleavage: None visible.
- Hardness
- 6-7
- Color
- White, cream, or light grey background with black spots
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 6-7.5 (Mohs scale); Color: White, cream, or light grey background with black spots; Luster: Dull to vitreous; Crystal Structure: Microcrystalline; Cleavage: None visible.
Formation & geological history
Formed as an igneous rock, specifically a variety of quartz and feldspar (aplite) that contains inclusions of black basalt or arfvedsonite. It originated in Chihuahua, Mexico.
Uses & applications
Primarily used for jewelry such as beads, cabochons, and decorative carvings or tumbled stones for metaphysical purposes.
Geological facts
Despite its trade name 'Dalmatian Jasper', it is not a jasper/sedimentary rock but an igneous rock. The black spots are frequently identified as arfvedsonite rather than tourmaline.
Field identification & locations
Identify by its distinctive black-on-tan spotted pattern resembling a Dalmatian dog's coat. It is exclusively found in Mexico. Collectors should look for balanced spotting and a smooth polish.
