Bailey Banks & Biddle fine jewelers and the Julius Klein Group unveiled an array of large and exotic diamonds valued at nearly $19 million. The diamonds will be on display to the public Thursday through Sunday at the Carnegie Museum of Natural History in Pittsburgh, Pa.

The display, which is being held in conjunction with the museum’s sixth annual “Gems and Mineral Show,” includes the 407.48-ct. Incomparable Diamond, the world’s largest internally flawless fancy yellow diamond, owned in part by Bailey Banks & Biddle’s parent company, Zale Corp.

In addition, Julius Klein’s prized jewelry pieces are on display, including:

* A 50-ct. fancy orange pink cushion-cut diamond set in a platinum ring;
* A 90-ct. diamond necklace featuring a 14.46 D color “Lozenge’ cut diamond cascading from 75.63 cts of emerald-cut diamonds;
* A 78.59-ct. radiant-cut fancy yellow diamond necklace accompanied by 50-ct. radiant-cut, fancy yellow diamond earrings descending from diamond baguettes.

These pieces and others are available for sale in the Bailey Banks & Biddle “mini-store” set up inside the museum in conjunction with the exhibit. Tem percent of all sales will benefit the Carnegie Museum of Natural History to enable the annual gem show to continue.

JCK