- The dike is characterized by a greater abundance of muscovite than biotite; it also contains columbite-tantalite, cassiterite, beryl, spodumene, lepidolite, montebrasite, pollucite, and tourmaline.
- Autunite is widespread in the eastern United States and is particularly well known as an accessory in complex pegmatites that have been prospected for mica, feldspar, spodumene, and gems.
- Purple lepidolite and gray spodumene also can be found, and microcrystals of mangano-columbite are common.
Early 19th century: from French spodumène, from Greek spodoumenos 'burning to ashes', present participle of spodousthai, from spodos 'ashes'.
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