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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 pearlstone
 珍珠岩

From: Webster's Revised Unabridged Dictionary (1913)

 Pearl·ite Pearl·stone n. Min. A glassy volcanic rock of a grayish color and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under Perlitic.
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