We only use Natural AAAA Sapphires which are the top 15% of all real / genuine Sapphires available. They have a signature medium blue color and are slightly included while exhibiting high brilliance. This quality is typically used in fine jewelry by the 5th Avenue or Rodeo Drive Jewelers. We focus on Thai and Ceylon Sapphires (Sri Lanka) since in our opinion, they produce the most vivid blue color with high brilliance. The brightness makes our rhodium-plated white gold jewelry very appealing. White gold is trendy and more popular with the youth. 18k white gold contains 75% pure gold.