Editor comment: Blue is always one of the most illusive colors for tourmaline and second only to the Paraiba colors in terms of value and scarcity. Weighing 5.06cts., and measuring over 9x7mm, the pair could easily be mistaken for sapphires. We purchased the rough in Tanzania, but as tourmalines always come in from other parts of East Africa, the stones could also be Rwandan or Congolese in origin.