designer_replica Oris 674-7567-4064MB Men's watch

designer_replica Oris 674-7567-4064MB Men's watch Though most people think only diamonds are graded, there is also a set of criteria to evaluate colored gems. These are summarized in a grading report. A gem value is primarily based on its color. Here are the basics you need in order to understand a colored stone grading report.To understand color, remember that there are three primary colors (red, blue, yellow) and three secondary colors, which are the result of mixing primary colors (purple, orange, green). Nature often displays tertiary colors, such as red-orange, yellow-green, or blue-violet, which are a primary color mixed with a secondary color. When a color is mixed with gray, white, or black, we need the (overlapping) definitions of saturation, hue and tints. Saturation expresses the attribute of perception of gray undermining the depth of color. If a stone were all gray it would be said to have zero saturation.designer_replica Oris 674-7567-4064MB Men's watch Nature can not produce 100% saturation but if it could, there would 0% gray in the color. As a rule, the higher the saturation percentage is the more expensive the gem will be.Hue is the actual color perceived whether red, purple, yellow, green etc. In these terms, white, black and gray have no hue. Some hues, like red, pink and blue, are (today) considered being more valuable than others (e.g. yellow or purple). This has and continues to change with fashion, over time and between cultures. A color mixed with white is called a tint. A tint is lighter and less saturated than its original color. Generally speaking, the less tint, the better the hue, the higher the price. Exceptions are Padparadscha sapphires, Rhodolites and cornflower blue sapphires which are specifically characterized by the combination of hue and tint.To describe a color technically, one could correctly say, as an example, blue (hue) mixed with 20% gray (saturation) plus a bit of yellow mixed with a lot of white (tint);. Such descriptions are hard to imagine and not very attractive. Therefore color professionals use more illustrative names such as ;ivy green;, ;cornflower blue; or ;salmon orange; in connection with attributes like ;strong; or ;vivid;. Because these color names refer to something common and natural they express color in a more accessible way designer_replica Oris 674-7567-4064MB Men's watch.