igneous
Likely lepidolite-bearing pegmatite
Lithium-mica pegmatite, chiefly lepidolite (K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂) with quartz and feldspar
AI-generated identification · may be incorrectPink to lilac mica-rich material with a silvery, flaky sheen; lepidolite hardness is about 2.5–4 Mohs and it has perfect basal cleavage. The photo is not detailed enough to confirm the minerals or crystal structure.
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Physical properties
Pink to lilac mica-rich material with a silvery, flaky sheen; lepidolite hardness is about 2.5–4 Mohs and it has perfect basal cleavage. The photo is not detailed enough to confirm the minerals or crystal structure.
Formation & geological history
Likely crystallized from a late-stage, lithium-rich granitic pegmatite melt; such pegmatites formed across many geological periods. Exact age and origin cannot be determined from the image.
Uses & applications
Lepidolite is a lithium-bearing mineral and is collected as a specimen; pegmatites may also yield quartz, feldspar, and gemstones.
Geological facts
Lepidolite is a mica and commonly occurs in pink or lilac shades; it is not itself a gemstone-grade crystal in this rough piece.
Field identification & locations
Look for platy flakes that split into thin sheets and a pearly-to-silvery sheen alongside quartz or feldspar. Similar pegmatites occur worldwide, including Brazil, Madagascar, and the United States.
