BBC4 年
Tanzanite: Tanzanian miner becomes overnight millionaire
It is one of the rarest gemstones on Earth ... Its value is determined by rarity - the finer the colour or clarity, the higher the price. Tanzanite can only be found in northern Tanzania Mr ...
BBC4 年
Tanzanite: Tanzanian miner earns millions after second rare find
It is one of the rarest gemstones on Earth ... Its value is determined by rarity - the finer the colour or clarity, the higher the price. Tanzanite can only be found in northern Tanzania Mr ...