Yesterday I made a post about a diamond I saw while window shopping, a 12.01ct D IF diamond priced at 3.8 million USD. This morning I thought I would see what is available online, so I made a trip over to Blue Nile to use their search. Turns out there is a much better deal […]
Author Archives: admin
12.01ct D Internally Flawless Diamond @ 3.8 million USD
I often like to window shop at jewelry stores, just because I like the bling. I don’t actually like going into jewelry stores, I feel very out of place and hate how they hover over you. Or maybe I just look like trouble, so they stick close 😉 Anyway, today I was walking in Central […]
Diamond Master Set
A diamond master set, or sometimes called a diamond color master set, is a collection of diamonds use to grade the color of other diamonds. Both the GIA and the AGS offer color master sets, or I should say they will grade diamonds for inclusion into a set. The GIA does not actually sell sets, […]
Diamcor Mining Sells 91.72 Carat Diamond
Diamcor Mining is a small publicly traded company (DMI.V) that is based out of Canada and is actively mining in South Africa. I had the pleasure of taking taking my GIA G.G. program with one of their high level staff. I follow the companies press releases just to see what they are doing. For years […]
12.47ct Blue Diamond Sells @ $7.5 Million USD
Today Gem Diamonds set a new price per carat record at their Letšeng mine in Lesotho. The mine already holds the record for the the highest dollar per carat kimberlite mine in the world. Today they announced the sale of a 12.47ct blue diamond for $7.5 million dollars, or $603,047 per carat. The sale […]
Antique Diamond Pircelist
Some time ago a diamond dealer was cleaning out his desk (it must have been VERY dirty). He found an old wholesale price list for diamond. He sent it over to me via fax, so I’m posting it here for those who might find it interesting. This price list is from before the current GIA […]
Calculating Diamond Depth (round diamond)
A quick post about calculating diamond depth in a round diamond. If you have a diamonds measurements, you can calculate the total depth of the diamond. The total depth is a quick guide to ensure the diamond is ‘OK’. To calculate the depth you divide the depth by the average of the the minimum & […]
AGS ASET – Cutting 2.13ct -> 1.87 results
Way back in February we sent a 2.13ct diamond to the cutters. The diamond did not perform as well as it could (it was ugly) so it needed an overhaul. Our little experiment was to be cut by numbers, based on the AGS cut grade scale. The AGS uses a number scale with the highest […]
1.01ct Museum Piece
I came across this 1.01ct diamond, bought it with plans to recut… but sold it for education purposes. Most round diamonds cut these days fall within a certain range. For example a total depth would normally be in the 58% – 64%. These I would consider ‘normal’. Sometimes the way a rough diamond is found […]
AGS ASET – Recutting a 2.13ct diamond
Way back in 1996 The American Gem Society Laboratories released their cut grade system. The scale runs 0 to 10, with 0 being the best. It was not until 2006 that the GIA released their cut grade scale, no surprise they are different. The GIA uses words to describe their cut grades from Excellent to […]