
Is Tanzanite Running Out?
FACT: A Limited Supply of Tanzanite Remains.
It's not just marketing: experts estimate that tanzanite is likely to disappear within our lifetime. In 2013, independent geologists studied TanzaniteOne, the largest tanzanite mining company and estimated that the mine has no more than 30 years of production left.
I know this first-hand to be true, having worked for the mine when it was listed on the London Stock Exchange (AIM) for many years. As part of the compliance process for listing, independent geologists were required to visit and assess our assets, producing a JORC report in 2010 (the JORC Code is an internationally recognized standard for reporting mineral resources and reserves). This report confirmed that tanzanite deposits in our area were limited for "20 years at the current rate of mining". These reports carry legal liability, and the London Share Market is very concerned about its reputation and maintaining high standards of trust—which convinces me that these findings are legitimate and reliable.
(Below: Tanzanite Mining Area, with D Block in the background)
It’s important to note that TanzaniteOne only controlled a portion of the total deposits. Most other mines are smaller and less well-mapped, located in D and B blocks. These smaller operations use very basic mining methods and simple air supply systems, limiting their ability to dig deeper without significant investment in mechanized equipment. As a result, the total remaining supply of unearthed tanzanite is uncertain.
But, for once, I think we can believe the hype. Once tanzanite is gone, it could become a historic “heritage” gemstone, highly sought after by collectors worldwide.