Last Updated
：2025/11/20
pegmatite
（ plural ）
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A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica.
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pegmatite
The geologist carefully sampled the pegmatite vein to analyze its large feldspar and quartz crystals.
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The geologist carefully sampled the pegmatite vein to analyze its large feldspar and quartz crystals.
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