Zakum Diamonds!

Another possibility is that the diamonds won't drop unless you kill Zakum with one of the iTCG artifacts Adonis mentioned (Miner's Helmet, El Nathian Cloak, etc.) already in your inventory.

people in this forum tend to forget we are talking about nexon. implementing this type of a function would take loads of gm time and will require doing some very serious changes (like adding a die.script property to monsters in the wz file). it will also cause massive lag due to the need of the server to actually check what you are wearing and calculate the drops, which will also take more money out of nexon on buying better servers.

bottom line, no.