gold dust: the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining
gold: a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia
melastoma: type genus of Melastomataceae; Asiatic shrubs with leathery leaves and large purple flowers followed by edible fleshy black berries