Compressed Diamond is used in the Metallurgic Infuser.
Compressed diamond is created by inserting a diamond into an Enrichment Chamber.
In Mekanism v9, compressed diamond yields 80 units of diamond in the Metallurgic Infuser, the same as 8 diamonds.
Compressed diamond can be used in a Metallurgic Infuser with Obsidian Dust in order to create Refined Obsidian Dust, instead of a diamond. It is more efficient to use this refined diamond material as it is worth 8 times more than a normal diamond.