Buyer's guide
Tanzanite
Intense violet to blue color gives tanzanite much of its value. Paler stones are more common and less valued.
Design with tanzaniteDecember Birthstone
Sagittarius · Capricorn
Before the cut
From rough stone to custom jewelry
Tanzanite comes from a single hill in Tanzania, in brown rough that hides violet-blue inside. We craft settings worthy of how rare it is. Tell us if tanzanite caught your eye and we will start your design.
What to look for
Shows blue and violet by angle. The deepest bluish violet usually comes above 5 ct.
Visible inclusions lower value, most of all in lighter stones.
Mined tanzanite is often brownish. Gentle heating brings out the purplish blue. Coating is rare but exists.
The richest color tends to appear in bigger stones.
Explore another stone
