(1) Úc: The gems that have been discovered and mined include diamond, opal, Sapphire, Ruby, onyx, Topaz, Ngọc lục bảo, Aquamarine, zircon, peridot, Tourmaline, garnet, Amethyst, hibiscus, More than 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, […]
