This graph shows another interesting feature of diamond pricing.
Transitional cut diamond value.
In the early 20th century the european cut was evolving and its evolution lead to the birth of the transitional cut.
Its rarity make some believe that it is just a legend since you will not find a gia transitional cut in existence today.
Transitional cut diamonds typically bridge the gap between antique and vintage.
Direct descendants of the old european cut these progressive cuts saw an evolution toward a larger table a lower crown and a smaller culet than previous cuts.
Choosing old cut diamonds vs round brilliants.
Old european cut vs old mine cut what is the difference between old mine cut and european cut.
In addition to the carat cut clarity and color of an antique diamond the stone s value as a vintage piece can also affect its price.
Transitional cut diamonds were the common cut in the 1940 s.
Cut from approximately 1918 through the 1920 s and perfected by henry morse and his partner charles field the transitional cut diamond is a round faceted cut.
However unlike later brilliants the girdles of these stones remained unfaceted.
Transitional diamonds started emerging in the 1870s before marcel tolkowsky developed the modern brilliant cut in 1919.
Today we are seeing comparable prices of new and old cut diamonds.
The end of the 1930s brought transitional cut diamonds which eventually evolved into the round brilliant cuts that we commonly see today.
The bump in price for rounds at the 1 0 ct mark.
Old mine cut diamonds or miner cut were used in victorian and edwardian eras.
Diamond cutting and technology advanced quickly then to the modern round brilliant cut.
While other shapes rise in value more steadily from 0 7 to 1 2 ct round diamonds jump at 1 0 ct and have a less steep increase in pricing to 1 2 ct.
As time went on and the demand for antique diamonds increased so too has the price.
The transitional cut is a rare vintage cut that was being cut only for a few decades.
For example some collectors may be willing to pay more for a diamond that was cut in a particular time period.
In some cases old cut stones have surpassed in.
Old cut diamonds were prevalent through the end of the art deco era in pieces like this 1 70 carat diamond cluster ring which dates from the 1930s.
A diamond dealer would often devalue the stones by approximately 20 30 percent as that would be the amount of diamond weight lost in the recut.