mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Hardness: 2.5–3.5 (Mohs scale), Color: Pink, lilac, to purplish-gray, Luster: Vitreous to pearly, Crystal structure: Monoclinic (often flaky/micaceous), Cleavage: Perfect basal.
- Hardness
- 2
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Physical properties
Hardness: 2.5–3.5 (Mohs scale), Color: Pink, lilac, to purplish-gray, Luster: Vitreous to pearly, Crystal structure: Monoclinic (often flaky/micaceous), Cleavage: Perfect basal.
Formation & geological history
Formed in granitic pegmatites during the late stages of magmatic crystallization. It is often found associated with other lithium minerals like spodumene and tourmaline.
Uses & applications
A major source of lithium; used in the manufacture of glass and ceramics, and as a semi-precious stone for jewelry, carvings, and metaphysical collecting.
Geological facts
Lepidolite is known as the 'peace stone' in folklore because it contains lithium, which is used medically to stabilize moods. It is the most common lithium-bearing mineral.
Field identification & locations
Identify by its distinctive lilac-to-pink color and micaceous (sheet-like) structure. Found commonly in Brazil, Canada, Madagascar, and the USA (California/Maine).
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Arenite (SiO2 based)
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Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
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Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
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