I know when i started making jewelry for my friends and then to sell, I noticed these initials after the color of the bead. I never knew what they really stood for I just knew what they would looked like (after they arrived). Now that I am selling Jewelry and all of my Coupe de Sassy Line have crystals from Swarovski I include all these letters/initials. Here is a breakdown for you.
AB – Stands for Aurora Borealis. It refers to a rainbow like finish added to one side on the outside of the crystal/bead after polishing. Its intent is to give added shine and play of color to the regular faceted crystal. It is long lasting & does not fade or chip with normal wear
P – Stands for Protective Coating, a lacquer system, applied over the crystal effects designed to protect the effects from scratches, fingerprints or other damage. It also helps to prevent moisture that could lead to corrosion
AB2X – Stands for Aurora Borealis times two. The AB2X surface effect has two times the coating of the AB effect, covering the entire crystal/bead. The iridescent rainbow effect is seen on all sides, producing the utmost sparkle.
Xilion – Meaning the resembling of a diamond flash
Facet – Meaning one of the flat polished surfaces cut on a gemstone or occurring naturally on a crystal