igneous

Dalmatian Jasper (Dalmatian Stone)

Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)

Hardness: 5.5 - 7 (Mohs scale); Color: Pale gray, cream, or beige with black/dark spots; Luster: Dull to vitreous; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6 - 2.8

Hardness: 5
Color: Pale gray, cream, or beige with black/dark spots
Luster: Dull to vitreous

Identified March 11, 2026More igneous →

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Physical properties

Formation & geological history

Formed through volcanic activity where magma cooled and crystallized. It is primarily found in Chihuahua, Mexico. The black spots are inclusions of tourmaline or arfvedsonite (amphibole) minerals embedded in a matrix of microcrystalline quartz and feldspar.

Uses & applications

Predominantly used as a decorative gemstone for jewelry (cabochons, beads, carvings), metaphysical healing purposes, and ornamental stone collecting.

Geological facts

Despite its trade name 'Dalmatian Jasper,' it is technically an igneous rock (aplite) rather than a true sedimentary jasper. The name comes from its resemblance to the spotted Dalmatian dog breed. It is often dyed various bright colors like blue, red, or green for marketing purposes.

Field identification & locations

Identify in the field by its distinct cream-to-beige base color with irregularly shaped black or dark brown spots distributed evenly. It feels smooth and cool to the touch. It is almost exclusively sourced from Mexico, appearing in volcanic outcrops.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Magnetite

Magnetite (Fe3O4)

mineral