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After initial cutting, the diamond is shaped in numerous stages of polishing. Unlike cutting, which is a responsible but quick operation, polishing removes material by gradual erosion and is extremely time-consuming. The associated technique is well developed; it is considered as a routine and can be performed by technicians. [113]
A diamond with facets cut only a few degrees out of alignment can result in a poorly performing stone. For a round brilliant cut, there is a balance between "brilliance" and "fire". When a diamond is cut for too much "fire", it looks like a cubic zirconia, which gives off much more "fire" than real diamond. A well-executed round brilliant cut ...
Diamond colors more saturated than this scale are known as "fancy color" diamonds. Any light shade of diamond other than Light Yellow or Light Brown automatically falls out of the scale. For instance, a pale blue diamond won't get a "K", "N", or "S" color grade, it will get a Faint Blue, Very Light Blue or Light Blue grade.
With two remaining jewels of the Renaissance, the Côte-de-Bretagne red spinel and the Dragon perle, a pin shaped into the form of a delphin, the crown jewels collection contains as well among others, the emerald set and pearl earrings of Empress Josephine, the micromosaic [33] and the emerald and diamond [34] sets of Empress Marie Louise, the ...
The lozenge in heraldry is a diamond-shaped rhombus charge (an object that can be placed on the field of the shield), usually somewhat narrower than it is tall. It is to be distinguished in modern heraldry from the fusil , which is like the lozenge but narrower, though the distinction has not always been as fine and is not always observed even ...
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This fire—flashes of prismatic colors seen in transparent stones—is perhaps diamond's most important optical property from a jewelry perspective. The prominence or amount of fire seen in a stone is heavily influenced by the choice of diamond cut and its associated proportions (particularly crown height), although the body color of fancy (i ...