One place on earth
There is only one source of high-quality tanzanite in the world: a few square kilometres at the foot of Kilimanjaro, in northern Tanzania. As there is only one source, experts estimate that its supply may run out within a few decades, which is why it is called a one-generation stone.
Our stones are chosen there, where they come out of the ground, rather than bought further down the line.
The East African belt
Around tanzanite lies the belt that also gives us spinel, from Mahenge; tsavorite, four times rarer than emerald; rhodolite; and Malaya garnet, found by local miners in the Umba River Valley in the 1990s.
From rough to the bench
Rough is sorted and graded by hand, then chosen stone by stone for the pieces it will become, before it is cut in our own workshop.
Read about each stone
The World of Preciousness tells the story of every stone we work with.