인도 (인도): India is one of the world’s major gem suppliers, rich in diamonds, 사파이어, 녹주석, cordierite, golden emeralds, 루비, various garnets, amethysts, olivines, spinels, and electrical Stone, topaz and opal. 중국: China is a pearl supplier, and is rich in high-quality olivine, nephrite and sapphire. It also produces aquamarine, 전기석, 석류석, slabstone, turquoise and […]
