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Ch. 16: Formation of the Diamond

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FORMATION OF THE DIAMOND                129
heat ? For a substance to crystallize, its molecules must be free to move under polarizing and other metamorphic forces influenc­ing crystallization; but the diamond we know is neither soluble
nor fusible. It is the element carbon crystallized, and is con­sumed by heat. How, then, could it survive as a crystal in the crater of a volcano ?
" The key to solve this mystery was placed in my hand over half a century ago, by one of the greatest philosophers of the
Ch. 16: Formation of the Diamond Page of 396 Ch. 16: Formation of the Diamond
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