Zircon’s typical greenish blue color has been referred to as zircon blue. - Lydia Dyer, gem courtesy of John Dyer & Co. Zircon is a gemstone that’s not commonly known among jewelry buyers, which is a ...

The color of fine-quality iolite can sometimes rival that of sapphire or tanzanite. – Robert Weldon When tanzanite was first discovered, gemologists initially suspected it might be cordierite, a ...