While mining in an RFTools dimension, I encountered some silverfish blocks, and cleared them out of my way with a silk-touch pick. On a whim, I ran them through a dissolver and found that they actually processed (apparently as regular stone).

Thought it would be funny if it actually produced something 'insect related'.

FunFact: I'm not able to put the "Monster Egg" stone blocks in the dissolver as there isn't a recipe for them in the first place. So it's quite interessting that you got that working. (I'll still add the additional recipes)

It turns out that the Silk Touch turns the Silverfish block back into regular Stone, so the Monster Egg may not be obtainable.

That would explain why I was unable to put them into the dissolver... Probably keep the recipe anyways if the player obtains them somehow.