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Translucent, lemon-yellow crystals of londonite-rhodizite to 1.3 cm on matrix with crude red tourmaline crystals. The londonite-rhodizite fluoresces yellow under LW UV; areas of the matrix fluoresce a bright creamy-white. A nice example of this rare borate - londonite is the cesium-rich end member while rhodizite is potassium-rich. 5.5 x 4.8 x 4.1 cm.
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