The Hazen Diamond Necklace designed by Harry Winston, Inc. of platinum and contains 325 diamonds that have a total weight of approximately 131.4 carats. The Hazen Diamond Necklace is a good example of this as it incorporates several different cutting styles, including the pear, baguette, square, and round brilliant cuts. Photo by Chip Clark, Smithsonian Institution.
The Spanish Inquisition necklace consists of two strands of antique-cut diamonds and emeralds to which a lower pendant and upper chain containing modern, brilliant-cut diamonds were added. It contains 374 diamonds and 15 emeralds. The emeralds came from Colombia, while the diamonds were obtained from India. The large, central, barrel-shaped emerald weighs approximately 45 carats. Due to its rich color and exceptional clarity, it is one of the world's finest emeralds.