12mm Preciosa Crystal Rivolis in Crystal Nightfall.
Crystal Nightfall is a mix of smokey grays, ranging from lighter black diamond to mid-dark charcoals.
The range of gray changes based on the angle and light in which they are viewed, sometimes showing all one color of medium gray, and others showing much lighter towards the center, with a darker ring around the outside.
There is a darker gray foil coating on the back which catches the light.
These are marked with the Lead-free Brilliance leaf.