18K yellow gold accents on clasp and beads. Small beads measure 1/2 inch. Larger center bead is just over half inch and has designers name on both sides. My photos don't do it justice. The item "John Hardy Lava Sea Sterling Silver 18K Gold Necklace Iolite And Blue Topaz" is in sale since Thursday, June 27, 2019.This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Necklaces & Pendants\Gemstone". The seller is "kugelblitz_2007" and is located in Franklinton, Louisiana. This item can be shipped to United States.