Tiffany & Co. to disclose diamonds' origins

Jeweler will now list where stone was mined

Tiffany & Co. will begin telling its customers the source of all its diamonds.

It has begun tracking the journey of its diamonds from mine to store and will share those origins with consumers.

CEO Alessandro Bogliolo told Bloomberg that Tiffany is committed to “100 percent geographic transparency” and will not purchase any diamonds with unknown provenance even if responsible sourcing is assured.

Each diamond will have its source listed next to it in store.

The stone itself will have a unique serial number laser-etched on the diamond’s surface. The number will be invisible to the naked eye.