Ấn Độ (Ấn Độ): India is one of the world’s major gem suppliers, rich in diamonds, Sapphires, beryl, cordierite, Ngọc lục bảo vàng, hồng ngọc, various garnets, amethysts, olivines, spinels, and electrical Stone, topaz and opal. Trung Quốc: China is a pearl supplier, and is rich in high-quality olivine, nephrite and sapphire. It also produces aquamarine, Tourmaline, garnet, slabstone, turquoise and […]
