Mineral

Prase or Green Quartz

Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)

Hardness: 7 (Mohs scale), Color: Dull leek-green to sage-green, Luster: Vitreous to greasy, Crystal structure: Trigonal (hexagonal prisms), Cleavage: None/Conchoidal fracture, SG: 2.65

Identified April 9, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Dull leek-green to sage-green, Luster: Vitreous to greasy, Crystal structure: Trigonal (hexagonal prisms), Cleavage: None/Conchoidal fracture, SG: 2.65

Formation & geological history

Formed in metamorphic environments or hydrothermal veins where quartz is tinted green by micro-inclusions of silicate minerals like actinolite, chlorite, or hedenbergite.

Uses & applications

Used primarily as a semi-precious gemstone for jewelry, lapidary carving, and as a popular specimen for mineral collectors and metaphysical practitioners.

Geological facts

The name 'Prase' comes from the Greek word 'prasios', meaning leek-green. Historically, it was often confused with more expensive green gems like jade or emerald.

Field identification & locations

Identify by its characteristic 'leek-green' color and quartz-like fracture. Commonly found in metamorphic terrains such as those in Greece, Italy, and Russia. Collectors should look for a lack of transparency and a waxy surface texture.

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