Gem Pegmatites of Minas Gerais, Brazil: Exploration, Occurrence and Aquamarine Deposits
First in a series, this article reviews the exploration for gemstones and mining methods in Minas Gerais, Brazil.
The authors have encountered hundreds of polymer-filled aquamarines in the Chinese jewellery market.
Topaz, Aquamarine and Other Beryls from Klein Spitzkoppe, Namibia
This article presents, for the first time, both gemmological and geologic information on topaz, aquamarine and other beryls from miarolitic pegmatites at Namibia’s historic Klein Spitzkoppe mineral locality.
A Status Report on Gemstones from Afghanistan
An overview of the plentiful and various gem materials being discovered and produced in Afghanistan.
Hydrothermally Grown Synthetic Aquamarine Manufactured in Novosibirsk, USSR
Physical, chemical, spectroscopic and microscopic characteristics of a sample of hydrothermally grown synthetic aquamarine from the USSR are presented.
Aquamarine from the Masino-Bregaglia Massif, Central Alps, Italy
Aquamarine from granitic pegmatites of the Masino-Bregaglia Massif, Central Alps, Italy.