at Lake Manyara, Mount Gelai, and Sinya. Tanzania has rich areas where the infrastructure is extremely poor. The Kiwira deposits of gemstones, including diamond, emerald, Mine in the SongweKiwira Coalfields is near the Tanzaniarhodolite, ruby, sapphire, tanzanite, and tourmaline. Zambia Railway Authority (TAZARA) and Lake .
The Londonquoted miner said in a statement that "certain key personnel" were being questioned by the authorities in connection with an investigation into the diamond sector in the east African country. Tanzania has also blocked Petra from sending a parcel of diamonds, worth perhaps 20 million, from being exported to Antwerp.