Abstract
No upper limit on the size of crystals is to be expected, but the dimensions and occurrences of the largest known crystals in each of twenty-four categories (nine classes) of minerals are presented and discussed. The largest authenticated crystal of any type is a beryl from Malakialina, Malagasy Republic, being 18 m in length, 3.5 m in diameter, having a volume estimated at 143 m3 and a mass approximately 380,000 kg.
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