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Zambian shares experience on Future of the gemstone mining A high-level delegation of officials from Zambia visited Mozambique last week to share experiences on the future of the gemstone mining sector between the two nations, which are home to the world’s largest emerald and ruby mines respectively. The delegation, led by Ministry of Mines Permanent Secretary Paul Chanda, included senior representatives from the Zambia Revenue Authority, Mine Workers Union of Zambia (MUZ), National Union of Miners & Allied Workers (NUMAW) and Industrial Development Corporation (IDC), which owns 25 percent of Kagem Mining in a partnership with London-based Gemfields, which also operates Montepuez Ruby Mining (MRM) in the Cabo Delgado Province of Mozambique. The Zambian group, accompanied by Kagem chairman Dr Sixtus Mulenga and Gemfields and Kagem CEO Sean Gilbertson, travelled to Mozambique for the inauguration of MRM’s new US$15 million sort house by the Governor of the Cabo De

Studies methods of detecting low-temperature heated rubies from Mozambique Since their discovery in early 2009, the ruby deposits near Montepuez in Mozambique have produced an impressive number of exceptional-quality stones, including iconic gems such as the Rhino Ruby (22.04 cts), the Scarlet Drop (15.95 cts) and the Eyes of the Dragon (a pair of rubies pair weighing 11.23 cts and 10.70 cts), all of which were analysed by the Swiss Gemmological Institute SSEF. But from the very beginning, there has been evidence in the market of lower-quality rubies from Mozambique that have been heated with or without a flux (borax), resulting in healed fissures with residue, and in some cases heavily-fractured material that has been lead-glass filled. In more recent years, an increasing number of fine quality rubies from Mozambique have come onto the market, after having undergone so-called "low-temperature heating" (below 1000 °C). Presumably, the aim of this treatment