Rainforest Jasper
Microcrystalline Quartz var. Jasper (Rhyolite) · Decorative Stone / Semi-Precious Gemstone
Crystal System
Trigonal (microcrystalline quartz matrix), massive or nodular habit
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2 with accessory minerals (feldspar, quartz, amphiboles)
Formation Process
Igneous and hydrothermal processes involving silica-rich volcanic lava and ash that cools rapidly and undergoes subsequent hydrothermal alteration and silicification
About This Crystal
An opaque, polished tumbled stone featuring a deep olive-green to dark brown background with prominent orbicular, concentric circular patterns, and yellowish-cream patch inclusions
Physical Characteristics
Green and brown body color with white/yellowish spots, white streak, conchoidal fracture, no distinct cleavage, specific gravity of approximately 2.58 to 2.91, vitreous to waxy luster when polished, brittle tenacity
Optical Properties
Aggregated microcrystalline structure resulting in a general isotropic appearance under polariscope, refractive index around 1.54 to 1.55, generally non-pleochroic
Hardness & Durability
Origin Region
Australia (specifically Queensland), South Africa, and the USA; forms in volcanic and felsic igneous environments
Hardness & Durability
Mohs hardness of 6.5 to 7, high durability and toughness making it excellent for general jewelry and lapidary use, resistant to scratching by most everyday objects
Care & Maintenance
Easy to care for; clean with warm soapy water and a soft cloth, avoid harsh chemical cleaners, store away from direct sunlight and harder minerals to prevent scratching
Rarity & Value
Commonly available and affordable, with value determined by the uniqueness and aesthetic appeal of the orbicular patterns and color contrast
Special Characteristics
Features distinct orbicular or spherulitic growth patterns resembling raindrops or floral structures formed by mineral segregation during cooling
Lore & History
Often associated in modern crystal healing with deep earth connection, personal growth, joy, and emotional healing, though these are traditional and non-scientific beliefs