Blue Sapphire Jewelry

Scarcity and a color nothing else quite makes. The Kashmir mines produced for only a few decades in the late 1800s before running dry, and their stones carry a velvety, sleepy cornflower blue caused by fine silk inclusions that soften the light. At auction, fine Kashmir sapphires have brought more than $200,000 a carat. Today the name mostly describes that color, and when we grade blue, velvet cornflower is the reference point.

A sapphire from Sri Lanka, the island the trade called Ceylon, which has produced fine sapphires for over two thousand years and still does. Ceylon blue runs brighter and more luminous than the darker royal blues, a mid-blue that holds its light indoors. It is the living classic of the sapphire world.

Most are, and honestly so. Heating a sapphire to bring out its best blue is a permanent practice the trade has accepted for centuries, and nearly every blue sapphire in fine jewelry has had it. The rarer thing sits in our vault: loose heart-shaped sapphires, natural and unheated with known origin, kept for custom commissions. Ask and we will show you.

Yes. Sapphire is a 9 on the Mohs hardness scale, second only to diamond, which makes it one of the most durable colored stones you can wear daily. It is also the September birthstone, though a blue this good refuses to wait for September. Warm water, mild soap, and a soft cloth keep it clean; skip ultrasonic and steam cleaners.

Color, before anything. A fine blue sapphire holds its saturation in low light instead of going ink-dark, and reads alive rather than grey. Cut matters because it drives how evenly the color spreads across the stone. Carat weight comes last; a vivid two-carat stone beats a dull four-carat one every time. This is the order we buy in.