Robert Glenn

One in a million

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.

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