Pearlstone
[pɜ:lstəʊn]
解釋/意思:
(n.) 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.
錄入:威廉姆斯
[pɜ:lstəʊn]
(n.) 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.
錄入:威廉姆斯