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RM3400 Autunite and quartz
Very good-sized specimen of autunite/meta-autunite from this Portuguese locality, formed by numerous crystals of this phosphate that partially cover the quartz matrix. The fan-shaped autunite crystals and have a striking yellow-green color. Under long-wave UV light the fluorescence is intense. A display piece. 5u492r
Size: 10 x 7.6 x 7 cm.
Presents radioactive activity.
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