London Blue Topaz is a unique gemstone that possesses a sophisticated and mysterious allure similar to stormy skies. This gemstone is an ideal gift for December birthdays and 4th wedding anniversaries. The London Blue Topaz is a variety of Topaz with a hardness of 8, making it a durable and long-lasting choice for everyday wear. It is sourced from Brazil and has undergone an irradiation process to enhance its color to a mesmerizing gray-blue hue.