Search results
Results From The WOW.Com Content Network
In the United States, Canada, and Mexico, ring sizes are specified using a numerical scale with 1 ⁄ 4 steps, where whole sizes differ by 0.032 inches (0.81 mm) of internal diameter, equivalent to 0.1005 inches (2.55 mm) of internal circumference.
Diamond-weighing kit, with weights labelled in grams and carats. The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls.
Because of the remarkable hardness of sapphires – 9 on the Mohs scale (the third hardest mineral, after diamond at 10 and moissanite at 9.5) – sapphires are also used in some non-ornamental applications, such as infrared optical components, high-durability windows, wristwatch crystals and movement bearings, and very thin electronic wafers ...
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 ...
grade and electronic colorimeter scale [11] grade and electronic colorimeter scale [11] grade [12] grade and description [12] grade for .50ct and over [13] grade for under .50ct: series 1 scale [12] series 2 scale [12] D Colorless: 0 0–0.49 0 0–0.75 Exceptional white + Exceptional white + Colorless: River White Finest White Jager E 0.5 0.5 ...
Figures 1 and 2 show the facets of a round brilliant diamond. Figure 1 assumes that the "thick part of the girdle" is the same thickness at all 16 "thick parts". It does not consider the effects of indexed upper girdle facets. Figure 2 is adapted from Figure 37 of Marcel Tolkowsky's Diamond Design, [2] which was originally published in 1919 ...
Black Harris staffers have accused the campaign of "outright racial discrimination" and mistreatment, according to an article by the New York Times.
The structure is the result of numerous impurities with sizes between 1 and 5 microns. ... A round brilliant cut diamond set in ... Diamond balance scale 0.01–25 ...