mineral

Prase Quartz on Feldspar

Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)

Hardness: 7 (Quartz) and 6 (Feldspar). Color: Leek-green to olive-green quartz crystals on cream/tan bladed feldspar. Luster: Vitreous to pearly. Crystal Structure: Hexagonal (Quartz) and Monoclinic (Feldspar).

Hardness: 7 (Quartz) and 6 (Feldspar)
Luster: Vitreous to pearly

Identified February 12, 2026More mineral →

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Physical properties

Formation & geological history

Hydrothermal formation in skarn deposits or pegmatitic pockets. These specimens are typically associated with metamorphic environments where silica-rich fluids interact with iron-rich minerals. Common in the Aegean region.

Uses & applications

Predominantly used as a collector's mineral specimen. Rare high-quality pieces may be used as lapidary material for cabochons or unique carvings.

Geological facts

The name 'Prase' comes from the Greek word 'prasos' meaning leek, referring to its green color. The green color in this specific variety is usually caused by fine, needle-like inclusions of actinolite or hedenbergite within the quartz.

Field identification & locations

Identify by the distinct dull green 'leek' color and prismatic crystal habit. Commonly found in Seriphos, Greece, and Inner Mongolia, China. Collectors should look for undamaged crystal terminations on the host matrix.

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