Tumbled Mookite Jasper
Quartz var. Chalcedony (Mookite) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal, microcrystalline massive habit
Mineral Group
Silicates
Chemical Formula
SiO2
Formation Process
Sedimentary accumulation of radiolarian tests and silica precipitation in shallow marine environments
About This Crystal
A smooth tumbled stone with pale yellowish-beige and cream tones, crossed by a distinct reddish-brown linear band. It exhibits a waxy to vitreous luster and is translucent to opaque.
Physical Characteristics
Color is primarily beige and yellow with red iron-oxide inclusions; streak is white; cleavage is none; fracture is conchoidal; specific gravity is approximately 2.60 to 2.65; tenacity is brittle; non-magnetic; no significant fluorescence usually observed.
Optical Properties
Refractive index ranges from 1.543 to 1.553; doubly refractive with aggregate birefringence; non-pleochroic; displays no chatoyancy or special optical phenomena.
Hardness & Durability
Origin Region
Western Australia (Kennedy Ranges), found in sedimentary formations
Hardness & Durability
Mohs hardness of 6.5 to 7; good toughness due to microcrystalline interlocking structure; stable and suitable for everyday jewelry wear.
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemical cleaners or prolonged acid exposure; store separately to prevent scratching softer materials.
Rarity & Value
Common to uncommon globally, but specific high-grade mookite is exclusively sourced from Australia; moderately priced for tumbled stones and cabochons; rarely treated.
Special Characteristics
Notable for its distinctive earthy pastel color combinations and sharp contrasting iron-oxide banding resulting from weathering processes.
Lore & History
Popular in modern crystal healing as a nurturing stone associated with vitality and decision-making, often linked to the root and solar plexus chakras, though these are traditional beliefs rather than scientific properties.