インド (インド): India is one of the world’s major gem suppliers, rich in diamonds, サファイア, ベリル, cordierite, golden emeralds, ルビー, various garnets, アメジスト, カンラン石, spinels, and electrical Stone, topaz and opal. 中国: China is a pearl supplier, and is rich in high-quality olivine, nephrite and sapphire. It also produces aquamarine, トルマリン, ガーネット, slabstone, turquoise and […]
