Name of mineral : iolite Mohs hardness : 7〜7 1/2 Refractive index : 1.542〜1.551 Specific gravity :2.61 Weight :3.44 ct Size (mm) : L 11.1×W 9.2×D 5.72 untreated Gem quality us $1,000 宝石辞典もくじ 戻る 次ページ