Saninu Laizer, the small-scale miner in Tanzania, who in late June this year, earned $3.4 million after selling two rough Tanzanite stones to the country’s Ministry of Mining, is on the verge of making other hundreds of millions after mining yet another gemstone of similar kind.

The new stone, which weighs 6.33kgs, is yet to be valued by mining experts. At that weight, the gemstone becomes the second-heaviest Tanzanite to have ever been mined in the North of Mirelani.

In late June 2020, Laizer, 52, became an overnight millionaire after selling two rough Tanzanite stones – the biggest ever find in the country.

The father of 30 children sired with four wives earned $3.4m from the country’s mining ministry for the gemstones, which had a combined weight of 15kg.

Tanzanite is only found in northern Tanzania and is used to make ornaments.

It is one of the rarest gemstones on Earth, and one local geologist estimated in an interview with the BBC that its supply may be entirely depleted within the next 20 years.

The precious stone’s appeal lies in its variety of hues, including green, red, purple and blue.

Its value is determined by rarity – the finer the colour or clarity, the higher the price.

Laizer mined the stones, weighing 9.2kg and 5.8kg, which he sold on June 23 during a trading event in the northern region of Manyara.

President John Magufuli phoned in to congratulate Laizer on the find.

“This is the benefit of small-scale miners and this proves that Tanzania is rich,” the president said.

Magufuli came to power in 2015 promising to safeguard the nation’s interest in the mining sector and increase the government’s revenue from it.