Geographic Origin Determination of Paraíba Tourmaline ...
· Examples of geographic origin determination for typical stones from Brazil, Nigeria, and Mozambique are shown in Cases 1–3. These stones were examined by GIA. Photographs and weights of the samples used for these case studies are shown in figure A1. Three spots on each stone were analyzed by LAICPMS; the results are listed in table A1. Cases 1, 2, and 3 plotted in the typical .
Get Price