Lepidolite

Physical Properties

Hardness: 2.5-3.5; Color: Pink, lilac, purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal (micaceous); Specific gravity: 2.8-2.9

Formation & Geological History

Formed in late-stage magmatic crystallization within granitic pegmatites. It is often found associated with other lithium-bearing minerals like spodumene and tourmaline.

Uses & Applications

A major source of lithium for glass making and batteries; also used as a decorative stone and in jewelry (though soft), and highly valued by mineral collectors for its unique color.

Geological Facts

Lepidolite was originally named lilac stone because of its lavender color. It is the most common lithium-bearing mineral and is often found in massive aggregates where individual flakes are visible.

Field Identification & Locations

Identify by its distinctive purple/pink hue and perfect micaceous cleavage (can be peeled into thin layers). Commonly found in Brazil, Canada (Tanco Mine), and the United States (California, Maine).

Identified on: 5/15/2026

Mode: Standard