Black Marble

[Cragzop]

ANyone know where this drops?

[akerrah]

Siren's Grotto in the well has a pretty good drop rate for black marble, pristine emeralds and flawless diamonds.

There are others, but I can't remember off-hand. Skyshrine, I think. WW dragons too?

[Kaidian Blade]

Icewell Keep. Can drop off just about any mob there.

[Unmei]

Also..

Dragon Necropolis Rats and Bats.