For mixed media jewelry and altered art, often tiny to small shells are required. If you are using acrylic or natural pearl, same applies. I'm always on the lookout for tiny organic materials like shells. Most here are .5-.75 tiny! but there are some great turbos that are 1.25-1.50 inches, great for a focal in mini assemblage. Shells can be colorized, too...did you know that? I prefer Perfect Pearls,which is a mica powder with a resin base. Find it in the Mixed Media Supplies section of this website. BONUS IN THE MIXES: Vintage pearl CAB stones, 4 to 12mm, for the most part. Sold in generous packages of 3.5 ounces (and that is A LOT of little shells!) All are clean and ready to use, too...as well as in good condition. NOTE: not beads, undrilled, use as design elements in other ways.