A Tanzanian miner and father-of-30 has become a millionaire overnight after he discovered two huge gemstones worth £2.4million. The government handed Saniniu Laizer a cheque for 7.74 billion Tanzanian shillings (£2.4million) for the two dark violet-blue stones, each about the size of a forearm, during a trading event in the northern region of Manyara yesterday. Laizer discovered the chunks in one of the tanzanite mines in the north of the ...