One of my habits is if malachite is available the game, I'll keep a chunk of it in my inventory for "good luck." It's sort of an homage to my days playing a Magician in EQ, where malachite was the reagent needed to summon your elemental pet, and not having a piece of malachite meant you were absolutely screwed if your pet died.
It's actually surprising how many games have malachite in them.
