Chain is 14k Gold Filled and the pendant is round 14k gold plated, non tarnish with added birthstone crystals in Swarovski Crystals. Add 1-6 stones. Stones will start on the left top and will wrap around the edge of the circle. Please leave the stone colors in the order that you want them in the notes section at checkout. *stand up model is wearing a 20 inch chain layered with our HAPPY HEARTS Necklace and close up model photo is wearing a 16 inch chain.