These were found as old stock at a charity store in ziplock bags handwritten with Swarovski on the price tags. I have no way of absolutely confirming this, but the quality and finish is representative of the brand. The 18mm faceted bead is made of high-quality crystal and contains uranium oxides with an Aurora Borealis finish that gives it a unique and beautiful look. The uranium content causes the piece to fluoresce under UV/Black Light. This bead is suitable for crafting and jewelry making, and it is sure to make a statement no matter how you choose to use it.
The Aurora Borealis finish is best seen in bright conditions like the first image. In darker environments it is much more subtle as in the later pictures.