Pegmatite deposit

Ore deposit

Pegmatite dikes and pods from the last, water-rich fluid of a granite crystallise in zones from the walls inward, gathering rare elements and giant crystals; the complex ones hold lithium, beryllium, tin, tantalum and gems.

Rocks

Pegmatite, Granite

Minerals

Quartz, Orthoclase, Albite, Mica, Beryl, Tourmaline, Spodumene, Apatite, Garnet, Cassiterite, Sapphire, Emerald, Topaz, Moonstone, Zircon, Citrine, Kyanite, Alexandrite, Aquamarine, Rose Quartz, Smoky Quartz, Spessartine, Hiddenite, Kunzite, Sunstone, Bismuth, Phenakite, Aegirine, Cacoxenite, Cancrinite, Crandallite, Neptunite, Wolframite, Dumortierite, Grandidierite, Musgravite, Jeremejevite, Paraíba Tourmaline, Bornite, Boehmite, Molybdenite

Metals

Aluminum, Bismuth, Copper, Molybdenum, Tin, Tungsten

Worked

Since the industrial age

Examples

Karelia, feldspar crystals of thousands of tons; Black Hills, South Dakota, spodumene crystals twelve metres long

Sources

• Pegmatite. Wikipedia.

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