スター効果
1. Asterism (gemmology)Asteria, or star stone (from Gr. star) is a name applied to ornamental stones that exhibit a luminous star when cut en cabochon. The typical asteria is the star-sapphire, generally a bluish-grey corundum, milky or opalescent, with a star of six rays. In red corundum the stellate reflection is less common, and hence the star-ruby occasionally found with the star-sapphire in Ceylon is among the most valued of "fancy stones".
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Read “Asterism (gemmology)” on English Wikipedia
Read “スター効果” on Japanese Wikipedia
Read “Asterism (gemmology)” on DBpedia
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