Necrotic Crystal

A diamond can be a colorless stone, but when it is cut by the hands of a master, it becomes as brilliant as light itself.  And once it attains that brilliant state, it is capable of bringing out the worst in men: materialism, covetousness, greed.  The greatest purity allows for the unholiest corruption; the purest gems can harbor the foulest curse. 

Necrotic Crystal is an 11-piece polyhedral dice set that's perfect as an introductory set for fifth edition Dungeons & Dragons (DnD 5E).  It includes all of the dice present in a regular 7-piece polyhedral set, plus an extra d20 (so that you can make advantage and disadvantage rolls simultaneously) and three extra d6 dice (for a total of 4d6, which allows you to more easily generate your ability scores by rolling all four dice at once).  The dice are crystal-clear resin with varying amounts of pitch-black smoke drifting through them.  Numbers are painted in gold.  The quantities and sizes are as follows:

-1 d4 (16mm)

-4 d6 (16mm)

-1 d8 (16mm)

-1 d10 (16mm)

-1 d00 (16mm)

-1 d12 (18mm)

-2 d20 (20mm)