There is a mix of 3mm and 4mm in a color palette which may include all or some of the following colors: 

Amethyst 2 AB, Sapphire Satin, Amethyst, Fuchsia, Fuchsia Satin, and Burgundy.

Many of these crystals are AB (Aurora Borealis), which is Swarovski's most popular crystal coating that gives each bead a glimmering rainbow appearance.