Platinum dust is one of the metal dusts that are used in GregTech.
Platinum Dust can be obtained from various sources. One good source is Sheldonite Ore found in The End. Using an Industrial Grinder gives 2 Platinum Dust per ore using water. This amount can be increased to 3 Platinum Dust per ore when using Mercury Cells. Putting Iridium Ore into an Industrial Grinder results of 2 Tiny Piles of Platinum Dust with water or a full pile of Platinum Dust with a Mercury Cell. Ferrous Ore in the Industrial Grinder with Mercury Cell will also give one Platinum Dust.
Platinum Dust is mainly smelted into Platinum Ingots which are used in some of the high-end items.