Just a suggestion:
Would´nt something like:
3 Shards = 1 Crystal
3 Crystals = 1 Polycrystal
and
1 Polycrystal = 3 Crystals
1 Crystal = 3 Shards
be nice
(It could also be a 5/1 ratio)

Its just the crystal-system for crafting is rather annoying
I would enjoy the crafting more without the crystal-system at all
but thats not gonna happen i guess..