We realize it is difficult to tell what each crystal color will look like on certain fabrics. Please refer to our Instagram to see lots of different crystal color and fabric combinations. If you are still unsure of what crystal color will look best on your fabric choice please email Lauren at Lauren@acbikinis.com.  AB is the abbreviation for Aurora Borealis which is a special finish applied to the crystals to make them more radiant. Aurora Borealis is the phenomena in the northern skies. The same shimmering rainbows of color can also be seen radiating from the ab crystals. Crystal clear is not an AB crystal therefor there is no color to it versus crystal ab which has iridescent hints of every color with light. The AB crystals are a more expensive crystal and will sparkle more on stage.