Tanzanite is only found in the foothills of Mount Kilimanjaro in Tanzania, from which it ... The Ruby Violet mine, owned by Gemstone Mining, produces 5,000 to 7,000 carats a year.

Dr Rachel Perks: So Tanzania, by far one of the most well-organized small ... So for instance, in Zambia, we source gemstones that the mine is owned by a Zambian, an artisanal small-scale mine, cut by ...

The Government of Tanzania’s rural electrification campaign is boosting mining profitability, creating jobs, and improving ...