A 3.85 carats blue tourmaline is a gemstone known for its vivid blue color and significant weight of 3.85 carats. Tourmalines in this color range are often referred to as indicolites. This gemstone is prized for its transparency and brilliance, often being faceted to enhance its visual appeal. The blue hue is typically caused by trace elements such as iron or copper. Blue tourmalines are highly valued in the jewelry market for their striking color and exceptional clarity.