5.50ct Indicolite / Blue Tourmaline Rough Mineral Specimen



Blue tourmaline is also known as Indicolite which is a reference to its indigo-like color. Blue tourmaline is the rarest of all tourmaline colors, and most pure blue specimens are under 1 carat in weight. The beautiful blue color is caused by copper and is reminiscent of deep blue water that one will find while deep-sea fishing.