Nineteen48

At over 5 carats, this oval green sapphire from an artisanal mine in the Tanga region of north-eastern Tanzania is both big and beautiful. This out...

A statement piece, this stunning golden-brown stone is just shy of 12 carats. Oval-cut and full of depth, it would make a great cocktail ring.

An intense natural green tourmaline in baguette cut, just over 3 carats. Bold lines and saturated colour.

Pair-cut green tourmaline with lovely proportions and even, rich saturation.