A scanning electron microscope image of gemstone processing waste. Researchers are exploring ways to use gemstone processing waste in cement, reducing the environmental impacts of both industries.
London — Sixty Namibian small-scale gem miners have been trained in cutting and polishing gemstones under a Commonwealth Secretariat project to develop the country's small and cottage industries.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback