mineral
Prase Opal
Hydrated amorphous silica (SiO2·nH2O) with nickel inclusions
AI-generated identification · may be incorrectHardness of 5.5-6.5 on the Mohs scale, vibrant yellow-green to apple-green color, subvitreous to waxy luster, amorphous crystal structure, and conchoidal fracture.
Identified More mineral →
Explore Prase Opal in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 5.5-6.5 on the Mohs scale, vibrant yellow-green to apple-green color, subvitreous to waxy luster, amorphous crystal structure, and conchoidal fracture.
Formation & geological history
Formed at low temperatures from silica-rich water solutions precipitating in cavities of volcanic or sedimentary rocks.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, and gemstone jewelry collections.
Geological facts
The distinctive green coloration is caused by trace amounts of nickel rather than chromium or vanadium.
Field identification & locations
Identify by its characteristic waxy luster and bright green hues; commonly sourced from deposits in countries like Tanzania, Australia, and Poland.
