Some type of black Ti/N or black chrome kit ... possibly with Ti/N gold, chrome, or Rhodium accents ...
Majestic Jr in Ti/N Black + Rhodium Fountain Pen
This would probably be a lil over the top, but would certainly fit the bill.
I'ld say take a pearlescent white style of blank and put in a serpentine ebony veneer and hit the veneer with a high gloss shine topped with platinum pearl for a beautifully deep black sparkle ...
PSI's White and Black pearl might fit the bill for the blank itself ... if the black doesn't sparkle enough for you, hit it with a pearlescent topcoat sealed with CA?
Never tried it, but I hear that pearl over black is gorgeous.