Amethyst (Chevron Amethyst)

Physical Properties

Hardness: 7 (Mohs scale); Color: Purple with white/milky quartz banding; Luster: Vitreous; Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & Geological History

Forms in hydrothermal veins or as geodes in volcanic rocks. The purple color comes from irradiation of iron impurities in the quartz. Banded varieties like this form in layers over millions of years.

Uses & Applications

Used primarily in lapidary work, jewelry, decorative carvings, and as a popular specimen for mineral collectors and metaphysical practitioners.

Geological Facts

The 'Chevron' or 'Dream' amethyst specifically features V-shaped bands of white quartz. Amethyst was considered a 'Cardinal Gem' and was as valuable as diamonds until large deposits were found in Brazil in the 1700s.

Field Identification & Locations

Identify by its distinctive purple hue and lack of cleavage. In the field, look for hexagonal crystal points or banded patterns in host rock. Common in Brazil, Uruguay, and Africa.

Identified on: 4/27/2026

Mode: Standard