The depth of color in this Topaz is incredible making it a AAA grade color of London Blue Topaz. This Topaz is the most popular of all other Topaz gems because of its deep blue color that all customers want when purchasing a blue topaz gem. It is surrounded with openwork Yellow Gold trim including the bale. It is just a gorgeous piece of jewelry! Total Carat Weight: 3.50 cts Style: Pendant Chain Type: 20 inch 925 Sparkle Chain Number of Gemstones: 1 Type: Pendant Main Stone Color: Deep Blue Item Length: 21 in Main Stone Treatment: Not Enhanced Metal Purity: 925 Main Stone: London Blue Topaz Main Stone Creation: Natural Metal: 14K YG & Platinum over 925 Sterling Silver Brand: Unbranded Main Stone Shape: Oval 10x8 mm