Glass Imitations of Cu-bearing Mozambique Tourmaline

摘要

Alluvial deposits in the Mavuco area of northeastern Mozambique are famous for producing copper-bearing tourmaline in a variety of colours (e.g. Laurs et al., 2008a). At the 2015 Tucson gem shows, Michael Puerta (Intimate Gems, Glen Cove, New York, USA) showed one of these authors (BML) three pebbles that he obtained in Mavuco in June 2014. Although their general appearance was quite convincing for rough alluvial tourmaline (Figure 24), Puerta felt that they did not seem 'right'.