mineral

Green Quartz (Prasiolite variant or Aventurine)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: Pale mint green to sage, Luster: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified March 11, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Pale mint green to sage, Luster: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or as a constituent in igneous and metamorphic rocks. Most natural green quartz forms where amethyst or citrine is subjected to heat, or through inclusions like fuchsite mica. Found in various geological ages.

Uses & applications

Commonly used in jewelry as gemstones (faceting or cabochons), for ornamental carvings, and in alternative healing/mineral collections.

Geological facts

Natural green quartz is actually quite rare in nature; most commercial green quartz is produced by heat-treating lower-grade amethyst. In its aventurine form, the green color comes from inclusions of green mica.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and translucent pale greenish hue. Commonly found in Brazil, India, and parts of the United States. Ensure it is not calcite by testing for a lack of reaction to acid.

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