Ấn Độ (Ấn Độ): India is one of the world’s major gem suppliers, rich in diamonds, Sapphires, beryl, chất cordierit, Ngọc lục bảo vàng, hồng ngọc, various garnets, thạch anh tím, olivin, Spinel, 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, ngọc hồng lựu, slabstone, turquoise and […]
