Last Updated: November 21st, 2016

Famous Diamonds

Famous Gems

FAQ's, Myths and Rumors

Gemcad Files of Famous Diamonds

Diamond Weight Estimation

Some Large and Unique Diamonds Seen on Ebay

Notable and Record-Setting Fancy Colored Diamonds Sold at Auction (see also the Wittelsbach Diamond)


Some Notable Jewelry Stores in Oregon


GIA has published an article in "Gems & Gemology" discussing the so-called Ruspoli Sapphire and its confusion with a separate, cushion-shaped sapphire.

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 time.)

Here's something new: I have made estimates for the measurements of two 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% depth, 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.

In 2004 I was contacted via email, and in the email there was a link to a website discussing the cutting of this diamond crystal, weighing 292.86 carats, being billed as the largest rough green diamond in the world. A single crystal with a pale green coloration it displayed outwardly a turbid appearance, although stones from the alluvial diamond fields of Zaire, such as this one, sometimes contain a transparent inner core. He told me the stone was mined in the 1970s. The party handling the faceting of the diamond were interested in making a documentary of the process. Cutting started in early 2005, and it was intended to first have the diamond cut in two by laser. As there are no facilities to do this in the Great Britain (or at least, at that time), where the stone is being held, the sawing was carried out in Antwerp, Belgium. Afterwards it was cut and polished in London. Unfortunately the website's link to a section discussing the diamonds in depth no longer works and the diamonds themselves, unfortunately, were not of typical gem quality. Not all was lost, however-- the stones are along the lines of translucent "icy" diamonds which have been popular in high fashion jewelry in recent years.

This 52.36-carat sapphire came up for sale recently at The stone's color in the photograph is close to the true color but this does change considerably, to a deeper red, depending on the nature of the light, although perhaps not strongly enough to be called a color change sapphire. The stone, described as 'sherry-colored'. This stone was was found in 1975 at the Reward gemfield near Rubyvale in Queensland, Australia. Eight years passed before it was cut into the round brilliant seen here. There is a small piece left of the original rough stone, only one gem was cut from the rough.

Elizabeth Taylor's book My Love Affair With Jewelry.
I got this as a Christmas present for Christmas, 2002. Its great!

This website was compiled by myself, Ryan Thompson, and is for educational purposes only! I don't make any money from this website, and never intend to. My goal is to try and archive images of all the world's most famous gemstones and diamonds, so people online can look and read about them freely.

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