The three stones had been found by Saninu Laizer – a 52-year-old husband to 4 wives, and father to greater than 30 youngsters.
Mr Laizer waved the massive stone over his head earlier than handing it over to Tanzanian authorities officers who gave him a test to buy it.
The primary two stones have an estimated worth of $A4.7 million.
“We Tanzanians have determined that minerals ought to first profit us as a rustic,” Minister for Mines Dotto Biteko mentioned.
“We have now had sufficient of promoting our gems to others who profit whereas our communities stay poor … in lots of mining areas enterprise has gone up.
“Even areas the place there was no enterprise now issues have improved.”