Amethyst (Chevron or Banded Amethyst)

Physical Properties

Hardness: 7 on Mohs scale. Color: Violet to deep purple with white quartz bands. Luster: Vitreous/Glassy. Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Formation & Geological History

Formed in hydrothermal veins and cavities (geodes). The purple color results from irradiation of trivalent iron (Fe3+) in the quartz. High temperatures can cause the color to fade or turn yellow/brown.

Uses & Applications

Predominantly used for jewelry, lapidary arts (tumbled stones, beads), decorative home decor, and metaphysical collecting.

Geological Facts

Amethyst is the birthstone for February. The name comes from the Greek 'amethystos', meaning 'not intoxicated', as ancient Greeks believed the mineral protected its owner from drunkenness.

Field Identification & Locations

Identify by its characteristic purple color and standard 7 hardness (it will scratch glass). Chevron varieties like this one show 'V' shaped or straight bands of white quartz mixed with purple.

Identified on: 4/15/2026

Mode: Standard