Cave Pearls: The same calcite that forms stalactites and stalagmites sometimes forms around a grain of sand , forming these guys. Cave pearls, if you take them from the cave they will dry out and crumble to nothing. //kind of toothlike
Black Opal is Australia’s national gemstone. Found in the Lightning Ridge area in northwestern New South Wales, black opals are natural, solid stones that absorb scattered white light, giving it brilliant spectral colors.