Lepidolite

Physical Properties

Hardness: 2.5-3 (Mohs scale); Color: Lilac, pink, or purple; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific Gravity: 2.8–2.9

Formation & Geological History

Forms in lithium-rich granitic pegmatites. It is a secondary mineral usually formed through late-stage hydrothermal processes during the crystallization of magma.

Uses & Applications

Major source of lithium; used in the manufacturing of glass and ceramics, lithium batteries, and as a gemstone or ornamental stone in the jewelry trade.

Geological Facts

Lepidolite is the most common lithium-bearing mineral and was originally called 'lilalite' before being renamed after the Greek word 'lepidos' for 'scale' due to its micaceous structure.

Field Identification & Locations

Identify by its distinctive lilac color, micaceous (leaf-like) layering, and softness. It is often found in association with other lithium minerals like spodumene and tourmaline in pegmatite bodies.

Identified on: 5/1/2026

Mode: Standard