The gemstone Tanzanite has purple to blue tones. This stone undergoes a process that involves heating it to transform its brownish shade into vivid purple blue hues. This gorgeous gemstone complements the Sterling Silver Jewelry beautifully. The birthstone for the month of December is tanzanite. Culminating as stunning Tanzanite Jewelry for Capricorn and Sagittarius signs. Certain safety measures must be taken in order to preserve the beauty and lustre of your Gemstone Jewelry. These safety measures will help your Tanzanite Jewelry last longer.