Tanzanites are a mesmerising blue – running from ultramarine to light violet – and the second most popular blue gem after sapphire.
But they’re incredibly rare. All known deposits are confined to a few square miles in northern Tanzania. Just one place, worldwide.
For a gemstone with a large and rapidly growing popularity to have such a limited supply makes a ring of this beauty all the more special.
Shown here a Robert Glenn 18 carat white gold ring set with a 26.36 carat cabochon tanzanite and 1.80 carat small brilliant cut diamonds.