igneous
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
Hardness: 5.5-7 (Mohs scale); Color: Naturally white/cream with black spots, this specimen has been dyed green; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 5
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 5.5-7 (Mohs scale); Color: Naturally white/cream with black spots, this specimen has been dyed green; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed from the cooling of peralkaline volcanic magma, resulting in a fine-grained mixture of feldspar (the white) and arfvedsonite crystals (the black spots). Found primarily in Chihuahua, Mexico.
Uses & applications
Used widely in the jewelry and lapidary industry for beads, tumbled stones, and decorative carvings. Often used in metaphysical practices for its purported grounding effects.
Geological facts
Although commonly called 'Dalmatian Jasper', it is not actually a jasper (sedimentary) but an igneous rock. The black spots are typically composed of the mineral arfvedsonite rather than tourmaline as often misidentified.
Field identification & locations
Identify by the unique 'polka dot' pattern. It is an affordable stone frequently found in gemstone shops. This specific specimen is identified as dyed due to the vibrant artificial green hue throughout.
