Dalmatian Jasper
Microcrystalline Quartz var. Dalmatian Jasper (Igneous rock composed of Quartz and Feldspar with Tourmaline/Arfvedsonite spots) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal (Quartz matrix); massive or microcrystalline aggregate habit
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 with inclusions of K-feldspar, albite, and black amphibole/tourmaline
Formation Process
Igneous formation, originating as a microcrystalline quartz-rich intrusive or volcanic rock where fluids rich in silica and trace minerals crystallized together
About This Crystal
A tumbled, polished specimen featuring a pale cream to light grey-green opaque body sprinkled with distinct, sharply contrasting black or dark brown spots and patches
Physical Characteristics
Opaque transparency, vitreous to waxy luster on polished surfaces, white streak, uneven to conchoidal fracture, specific gravity around 2.60 to 2.70, brittle tenacity, no notable cleavage
Optical Properties
Singly or doubly refractive microcrystalline aggregate, isotropic to aggregate birefringence, non-pleochroic
Hardness & Durability
Origin Region
Primarily mined in Chihuahua, Mexico, as well as parts of Africa and the USA; forms in volcanic and igneous environments
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness and stability, suitable for everyday jewelry wear with proper setting protection
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemicals, ultrasonic cleaners, and prolonged direct sunlight to preserve surface polish
Rarity & Value
Common and widely accessible; highly affordable, typically sold as polished tumble stones, beads, and carved decorative items
Special Characteristics
Distinctive spotted pattern caused by dark mineral inclusions (often arfvedsonite or tourmaline) distributed randomly throughout the lighter quartz and feldspar matrix
Lore & History
Popular in modern crystal healing as a grounding stone associated with the root and sacral chakras, believed to promote playfulness, loyalty, and emotional balance, though these are traditional beliefs rather than scientific claims