The Paragon Diamond: The Paragon diamond is one of the more unusually shaped diamonds. It is a 7 sided diamond that measures 137.82 carts and is rated a flawless D in color. The necklace currently belongs to the Graff Company and is set in combination necklace - bracelet setting.
Excelsior Diamond: At the time of its discovery in 1893 the Excelsior Diamond was the largest diamond discovered at 971 carats. It was displaced by the Cullinan Diamond in 1905. The stone had a blue and white color and was eventually cut into 13 stones ranging from 68 carats to 13 carats.
The Amsterdam Diamond is a rare black diamond of African origin and is reported to be completely black. It weighs 33.74 carats, has 145 facets and was cut from a 55.85-carat rough. The stone was first shown in February, 1973, at D. Drukker & Zn., Amsterdam. It was auctioned off at www.christies.com in November, 2001, for $352,000, setting a world record for the highest price fetched by black diamond at auction.