Kimberley Diamond.

The Kimberley

A Flawless, 70-carat, step cut, champagne-colored diamond that was found in the Kimberley Mine, South Africa. It was recut into this modern shape in in 1921 from a large, flat stone that was once in the Russian Crown Jewels. In 1958, the stone was again recut by it's owners,

Baumgold Bros., New York City, to improve the proportions and increase brilliancy. It now weighs 55.09 carats and is valued by the firm at $500,000, but is probably worth considerably more. Baumgold Bros. sold the stone in 1971 to an undisclosed collector. Source: Diamonds: Famous, Notable and Unique (GIA).

Some of the upcoming stones are:

The Begum Blue
The Heart of the East
The Black Star of Queensland

The Empress Eugenie
The Paul I
The Khedive
The Golconda Pears
The English Dresden

Here are some stones that I am presently looking for photos and information on:

President Vargas ... largest gem cut from the stone weighs 44.17 carats
Brunswick Blue ... circa 13 carats, pear, dark blue (The diamond is a lost stone --

in this case a good illustration is what I am looking for)
Copenhagen Blue ... 45.85 carats, emerald, third(?) largest blue diamond in the world
unnamed ... 51.84 carats, round brilliant, blue, largest blue diamond in the world. (This and the Copenhagen Blue were both handled by Harry Winston at one t

ime.)

Here's something new: I have made estimates for the measurements of tw

o famous diamonds - the Blue Heart and the Porter Rhodes. I don't know their actual measurements, but I am researching it. I am going to post my estimate here and see how close I am (or not) to being correct.

The Porter Rhodes ... 21.65 × 21.65 × 13.09825 mm (assuming 60.5% dep

th, computes to 54.10 carats, actual weight is 54.04 carats)
The Blue Heart ... 20.035 × 20.035 × 12.121175 mm (assuming 60.5% depth, computes to 30.83 carats, actual weight is 30.82 carats)

The Porter Rhodes is an modern Asscher cut stone, which means its

width and length are equal or very near to it. I doubt the stone is going to be indentical in length and width down to the hundredth of a millimeter, but it will be fairly close. The stone is very well cut.