Strong global demand for coloured gemstones,1 particularly in India and China, has led to a phenomenal expansion of the market in recent years (KPMG 2014). Levin (2012) suggests that globally, 80 p…
Hamel, Mary J. - Hodgson, Abraham - Tagbor, Harry - Kalilani, Linda - Ouma, Peter - Pool, Robert - Manda-Taylor, Lucinda - Chatio, Samuel - Afrah, Nana A. - Pell, Christopher - Men˜ aca, Arantza - Were, Florence