Rainforest Jasper
Microcrystalline Quartz var. Jasper (Rhyolite) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal (microcrystalline aggregate, forming in massive or nodular habits)
Mineral Group
Silicates - Tectosilicates
Chemical Formula
SiO2 with accessory minerals such as feldspar, hornblende, and iron oxides
Formation Process
Igneous, forming from cooling and solidifying silica-rich volcanic lava or rhyolitic magma, with secondary hydrothermal alterations creating orbicular patterns
About This Crystal
Tumbled, smooth rectangular specimen featuring opaque olive green, dark brown, and black coloration with distinctive circular orbicular patterns, often called spherulites, giving it a rainforest-like appearance
Physical Characteristics
Colors range from green and brown to black; white streak; no true cleavage; conchoidal fracture; specific gravity around 2.58 to 2.91; opaque tenacity with a vitreous to waxy luster when polished
Optical Properties
Singly refractive aggregate with no pleochroism, anisotropic under polarized light due to microcrystalline quartz structure
Hardness & Durability
Origin Region
Australia (particularly Queensland), South Africa, and the United States; forms in volcanic environments
Hardness & Durability
Mohs hardness of 6.5 to 7; good toughness and durability, making it well-suited for daily jewelry wear without fragile cleavage planes
Care & Maintenance
Easy to clean with warm soapy water and a soft cloth; avoid harsh chemical cleaners and prolonged exposure to direct sunlight to maintain polish
Rarity & Value
Common and widely available; value depends on the visual appeal, pattern contrast, and quality of the polish, generally very affordable
Special Characteristics
Features distinct orbicular spherulitic structures formed by rapid cooling in volcanic rocks, creating eye-like patterns resembling foliage or rainforest canopy views
Lore & History
Often associated with deep connection to nature, emotional grounding, and personal growth in modern crystal healing traditions, linked primarily to the heart chakra