A clean and well cut stone, hand picked for its exceptional clarity and exceptional cutting.Details:~Very nearly flawless~No visible inclusions~Well cut~indicolite (teal, blue green)~2.78 carats~11.39mm x 5.85 x 4.65mm deep~Emerald bar cut~Natural Tourmaline~Treatment: No treatmentsTourmaline is sometimes heated to produce red or bright pink stones. Green stones and teal stones, (such as this one) are not commonly heated as doing so would produce a colorless stone, or a bright green stone. My understanding is that there is not a reliable method of detecting heat treatment in tourmaline. However, I can guarantee that this stone is natural in origin.Cheers,Austin