igneous
Dyed Dalmatian Stone (Dalmatian Jasper)
Aplite (predominantly quartz, feldspar, and arfvedsonite)
AI-generated identification · may be incorrectHardness 5.5-6 Mohs, vitreous to dull luster, granular texture; naturally off-white with black spots, this specimen has been artificially dyed magenta/red.
Identified More igneous →
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Physical properties
Hardness 5.5-6 Mohs, vitreous to dull luster, granular texture; naturally off-white with black spots, this specimen has been artificially dyed magenta/red.
Formation & geological history
Forms from late-stage granitic igneous intrusions into surrounding crustal rock, cooling into a fine-grained felsic matrix containing amphibole inclusions.
Uses & applications
Commonly tumbled, polished, and dyed for use in costume jewelry, beads, cabochons, and decorative ornamental items.
Geological facts
Although widely marketed as 'Dalmatian Jasper,' it is technically a silicate igneous aplite rather than a true chalcedony-based jasper.
Field identification & locations
Identified by its distinctive speckled appearance; primarily mined in Chihuahua, Mexico, dyed specimens may show concentrated color within surface microfractures.
