Saniniu Laizer (pictured), a polygamist with four wives and father of 30, found the third gem that weighed 6.3kg in one of the tanzanite mines in Manyara, northern Tanzania. The rare gemstone is ...

The dark violet-blue gemstones, each about the size of a forearm, were discovered by Laizer in one of the tanzanite mines in Manyara, northern region of Tanzania. The area is surrounded by a wall ...