Found, Lost, and Found Again: The Geological and Gemological Significance of the Salininha Emerald Deposit, Brazil

Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varie

Yuri Shelementyev, Galina Kriulina, Olga Yarapova, Viktor Vins, and Alexander Stolyarevich

Performing a literature search is a very important—but often neglected—part of doing gemmologica