Designed in 9ct yellow gold, with 8mm cushion swiss blue topaz stone and 20 round diamonds. Beautiful and versatile with the delicate colour of blue. Blue topaz is one of most popular stones and the birthstone for the month of December. Product Information Jewellery Type: Necklace Metal: 9ct Yellow Gold Gemstone: Diamond, Blue Topaz Diamond Weight: 0.10ct Blue Topaz Weight: 2.42ct