Mookaite Jasper
Quartz var. Jasper (Radiolarian Chert) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal, massive microcrystalline habit
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Sedimentary formation through the accumulation of skeletal remains of radiolaria in marine environments, followed by deep weathering and silicification
About This Crystal
A tumbled, polished smooth stone featuring a distinct bi-color or banded appearance with a creamy yellow section on the left and a rich, deep brown section on the right, separated by a fracture line with reddish-brown iron oxide staining. It is opaque with a waxy to vitreous luster on the polished surface.
Physical Characteristics
Body color ranges from pale yellow to rich brown; white streak; no cleavage; conchoidal fracture; specific gravity around 2.58-2.91; brittle tenacity; inert under UV light
Optical Properties
Singly refractive aggregate (microcrystalline quartz), isotropic or aggregate polarization under crossed polars, refractive index approximately 1.544-1.553, no pleochroism or special optical phenomena
Hardness & Durability
Origin Region
Western Australia (Mooka Creek), forming in weathering profiles of sedimentary basins
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness due to interlocking microcrystalline structure, highly stable and suitable for daily wear in jewelry
Care & Maintenance
Can be cleaned safely with warm soapy water and a soft brush; avoid harsh chemicals and ultra-sonic cleaners if internal fractures are present; store separately to prevent scratching softer stones
Rarity & Value
Common to uncommon globally, but specific high-grade Mookaite material is sourced exclusively from Australia; relatively affordable, typically sold as polished stones, cabochons, and beads
Special Characteristics
Notable for its striking natural contrasting earthy color combinations resulting from weathering and secondary iron/manganese infiltration
Lore & History
Popularized in modern crystal healing as an Australian aboriginal-inspired stone associated with vitality, strength, and decision-making, linked primarily to the root and solar plexus chakras