The FTB Forum is now read-only, and is here as an archive.
To participate in our community discussions, please join our Discord! https://ftb.team/discord
You can use dust for a rock cutter (electric tool with sick touch 3) or for any ic2 crafting recipe. Like glass fiber cable. There are lots of uses but only in the ic2 world. Its best to keep some around as diamonds. Now silk touch will get you the ore block which will macerate into 2 dusts... Hence you can increase your diamond efficiency. If you really really want to you use the rock cutter macerator your diamond ores into 2 dusts then use the implosion compressor to turn 4 dust into 3 diamonds. So you get 3 from 2 ores. But it takes effort. But you get the idea rock cutter rocks
Keep them as diamond ore, and then you can decide later whether you want to grind it in the factorization grinder for pure diamonds (similar rate with fortune 3 pickaxe) or GT industrial grinder for 1 diamond and 1.5 diamond dusts..