The similarities between Ethiopian emeralds and copper-bearing tourmaline are striking. August, 2017 On our trip to Bangkok, we found a perfect example of a neon-blue Paraiba tourmaline (courtesy of Star Lanka, Bangkok) for comparison with our 2.95 ct Ethiopian emerald. Exhibit 1 – Ethiopian 2.95 ct emerald compared with a neon-blue Paraiba tourmaline (courtesy of Star […]