DAR-ES-SALAAM-- Tanzanite was the name given to the blueish gemstone by jewelers Tiffany and Co. because it can only be found in Tanzania and only in the Mirerani Hills area of the northern region (province) of Manyara.

Now, there is a new site in the country where Tanzanite has just been discovered but its exact location is a secret tightly kept within State House.

President John Magufuli, who visited the Tanzanite Mining quarries in the Mirerani Hills of Manyara Region over the weekend, has revealed that there is another location where the blue gemstones have been discovered but did not provide any other information.

We have built a wall surrounding the mining quarries of Mirerani in order to curb the notorious theft and smuggling of Tanzanite, said the Head of State when inaugurating the 25-kilometre-long encirclement, described as the "Great Wall of Mirerani".

He added that state organs were still to investigate the mineral smuggling rackets. We have also just discovered a new location where there are ample Tanzanite reserves underground. Soon, this location will also be surrounded by a wall before mining operations start, said the president.

He insisted that all places found to contain valuable resources will be walled in. If the need arises to build a wall around Mount Kilimanjaro then by all means we shall do that, maintained Magufuli, insisting that no stone shall be left unturned when it comes to protecting the country's resources.

The Head of State also used the occasion to allay fears that Tanzanite gemstones are about to disappear from Mirerani, saying there are more than 1,760 million tonnes of Tanzanite yet to be lifted from underground and that the rare gemstones will still be mined at the hills for the next 25 years.

Dr Magufuli revealed that at the current rate of extracting 54 tonnes per year, depleting the nearly two billion tonnes of the rare blue gemstones from Block C quarry alone will take up to the year 2042.

Eesearch conducted in 2015 discovered that Block C' quarries alone have a reserve of 1,750 million tonnes of Tanzanite underground, he said.

Block C' is the mining plot from which Tanzanite-One Limited currently operates. The company is a joint venture between government-owned State Mining Company (STAMICO) and Sky Associated Group, a locally owned company.