Lepidolite

Hardness: 2.5-3.5 on Mohs scale. Color: Lilac, pink, purple, gray, white, yellow. Luster: Pearly to vitreous. Crystal structure: Monoclinic, typically found in scaly aggregates or massive forms, less commonly in distinct pseudohexagonal crystals. Cleavage: Perfect basal cleavage, creating thin, flexible sheets. Specific gravity: 2.8-2.9.

Lepidolite is a mica mineral formed in granitic pegmatites. It crystallizes from late-stage, lithium-rich magmatic fluids that are rich in potassium, aluminum, and fluoride. It is often associated with other lithium-bearing minerals like tourmaline (especially rubellite) and spodumene. Geological age varies depending on the pegmatite formation, typically associated with orogenic events millions to billions of years ago.

Source of lithium (though less significant than spodumene), used in the ceramic and glass industries to increase hardness and reduce thermal expansion. Also used as a flux in metallurgy. Due to its beautiful lilac and purple colors, it is popular as an ornamental stone, often carved into spheres, tumbled stones, and cabochons for jewelry. It is also collected by mineral enthusiasts.

Lepidolite is one of the few minerals that are a significant source of lithium, a critical component in batteries and certain alloys. Its name comes from the Greek word 'lepidos' meaning 'scale,' referring to its scaly appearance. It is sometimes called the 'stone of transition' due to its association with balance and emotional healing in metaphysical circles.

Identify in the field by its distinct lilac to purplish color, pearly luster, and flaky or scaly habit. Its perfect basal cleavage allows it to be split into thin, flexible sheets. It is relatively soft and can be scratched with a fingernail. Commonly found in major pegmatite districts around the world, including Brazil, the Ural Mountains (Russia), California (USA), Canada, Madagascar, and Afghanistan. Collectors seek out good quality crystals and specimens with vibrant color and interesting associations with other minerals.