Other valuable stones, the topaz, chrysolite, aquamarine amethyst and tourmaline are found.
Zircon, tourmaline, garnet and other precious stones of little commercial value are found throughout Australia.
Flattened crystals of garnet, films of quartz, and needles of tourmaline are not uncommon.
Tourmaline or rubellite is found on the borders of the Ruby Mines district and in the Shan State of Mong Long.
In other cases, especially near mineral veins, slates are filled with black needles of tourmaline or are bleached to pale grey and white colours, or are silicified and impregnated with mineral ores.