(1) Úc: The gems that have been discovered and mined include diamond, đá mắt mèo, Sapphire, Ruby, mã não, Topaz, Ngọc lục bảo, Aquamarine, zircon, đá Peridot, Tourmaline, ngọc hồng lựu, Amethyst, hibiscus, Hơn 20 important gemstones such as rhodolite, fluorite and nephrite are written. Trong số đó, opal and sapphire are the most famous. Opal production accounts for 98% of the world, [...]
