Colorfin PanPastel Mediums Artist Pastels Set, 9ml, 5-Pack They can be used to create a variety of effects from a soft pearl sheen (fine) to a shimmering sparkle (coarse) Use the white mediums to tint colors and the black mediums to create darks and shades for rich; jewel-like effects Set includes Pearl Medium Black Coarse; Pearl Medium White Coarse; Pearl Medium Black Fine; Pearl Medium White Fine and Colorless Blender