Rondelle and round shaped, faceted White Topaz with Sterling Silver round smooth beads and Sterling Silver fine cable chain, wire wrap, ring, oval chain and spring ring clasp Topaz is 3mm and 4mm; Sterling Silver beads are 2mm Necklace is approximately 16 1/2 to 17 3/4 inches long White Topaz can be used as a substitute for April's birthstone, Diamond. Note: All pearls/stones may slightly vary in color, shape, and size because they are real/natural pearls/gemstones. Some may have been dyed or heated to enhance their color. I do my best to match all pearls/stones for color, pattern, shape and size. All pictures are taken in natural light. Colors may vary slightly when viewed on different screens/devices.