Statistics of Size, Color and Enhancement of Copper-Bearing Tourmaline from Mozambique
Fig. Par08 Statistics of number of certified copper-bearing tourmalines (”cuprian-elbaites”) from Mozambique sorted by color and size, as tested in the years between 2006-2008. Only gem-quality faceted stones are included, both heated and unheated respectively (See Fig. Par07). The majority of these gems are below 20 cts in size. Larger sizes of all different colors are extremely rare. Sizes of over 100ct exist but they are generally heat-treated. The largest unheated violet and purple colors are in the category of 45-50 ct.
Statistics of Size, Color and Enhancement of Copper-Bearing Tourmaline from Mozambique
