Indigolite

Indigolite is a gemstone variety of the mineral tourmaline. Its name derives from its deep blue color, reminiscent of indigo dye. This color is typically caused by the presence of iron within the crystal structure. Indigolite can range in shade from a light, sky blue to a very dark, almost blackish blue. It is often found in association with other tourmaline colors, such as green or pink, sometimes exhibiting a color zoning effect. The gem is known for its vitreous luster and can be cut into various shapes for use in jewelry. Its refractive index and hardness, typical of tourmaline, make it a durable gemstone suitable for everyday wear. Indigolite is found in several locations worldwide, with notable deposits in Brazil, Afghanistan, and Africa. While not as commonly known as some other tourmaline varieties like rubellite or indicolite, indigolite is prized by collectors and jewelry enthusiasts for its distinct and attractive blue hues. Its rarity and the specific conditions required for its formation contribute to its value.