Journal of Gemmology Precious Braswell 12/1/18 Journal of Gemmology Precious Braswell 12/1/18 Native Copper Inclusions in a Cu-bearing Tourmaline Read More Gems & Gemology Precious Braswell 9/21/01 Gems & Gemology Precious Braswell 9/21/01 Nigeria as a New Source of Copper-Manganese-Bearing Tourmaline Read More
Journal of Gemmology Precious Braswell 12/1/18 Journal of Gemmology Precious Braswell 12/1/18 Native Copper Inclusions in a Cu-bearing Tourmaline Read More
Gems & Gemology Precious Braswell 9/21/01 Gems & Gemology Precious Braswell 9/21/01 Nigeria as a New Source of Copper-Manganese-Bearing Tourmaline Read More
