Nimbus Spar and Nimbus Diamond.
The spar is from Events.. from the Eggs u get in all events like 15rc,NT,PvP (1,2,3 place).
Its not tradeable.. but u can still trade an equip to the char that has the diamond, put the diamond on the item and give the item back.

The Diamond is only from The Slot Mashine Game.. in Diamond cast. its tradeable and prices are crazy xD.