igneous
Tumbled Dalmatian stone (Dalmatian jasper)
Trade name; commonly a leucocratic igneous rock with dark aegirine/arfvedsonite-group inclusions, often sold as “Dalmatian jasper”
AI-generated identification · may be incorrectCream to pale-yellow matrix with irregular black spots and a polished, generally opaque surface. Hardness is about 6–7 Mohs; the exact mineral mix and crystal texture cannot be determined from the photo.
Identified More igneous →
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Physical properties
Cream to pale-yellow matrix with irregular black spots and a polished, generally opaque surface. Hardness is about 6–7 Mohs; the exact mineral mix and crystal texture cannot be determined from the photo.
Formation & geological history
Typically sourced from igneous rocks in Chihuahua, Mexico; the spots are dark minerals crystallized within a lighter feldspar-rich matrix as magma cooled. Geological age depends on the deposit and cannot be established visually.
Uses & applications
Commonly tumbled for pocket stones, beads, cabochons, and decorative objects; not typically used as a major construction material.
Geological facts
Despite its trade name, it is generally not jasper, which is an opaque variety of silica-rich chalcedony.
Field identification & locations
Recognize it by the cream-colored body and scattered dark spots; verify identity with mineralogical testing, since similar spotted stones exist. Often sold by lapidary and mineral shops.
