Cut dramatically affects the appearance of a gemstone. Gemstones are cut to maintain maximum weight while exhibiting optimal color and brilliance. A well cut gemstone is able to handle the play of light; the gemstone comes alive with life and sparkles as light dances through their facets. Take a closer look at a gemstone.
There should not be any dark lifeless areas (extinction) or flat washed out zones (window); there should be consistent light refraction throughout the gemstone.
Color is the most defining characteristic of a gemstone. Most gemstones occur in a spectrum of colors, while some have more restricted palettes. Since the color phenomenon in gemstones can become very complex, experts analyze the chromatic options in terms of three essential components: hue, tone, and saturation.
Hue is the primary color of the gemstone. Tone represents the depth of color, ranging from colorless to black. Gemstone tone is described as ‘light’, ‘medium-light’, ‘medium’, ‘medium-dark’ and ‘dark’. Finally, saturation refers to the purity or intensity of the primary color. As a general rule, a bright, intense, pure, rich and vivid color is considered the industry best.
The most valuable gemstones are those that exhibit a pure color with only slight hues of secondary colors.
The primary color should be medium, neither too dark nor too light.
While buying gemstones you need to be aware of color ranges and objective value assessments, but it is best to rely on your eyes; if a particular color speaks to you, by all means listen.
Select your gemstone that fit yor needs the best.
Gemstones naturally have characteristics, called inclusions that were created during the process of crystallization of the gemstone. Inclusions do not necessarily diminish a colored gemstone’s beauty or desirability. It is difficult to find gemstones without any inclusions or imperfections.
If there are no inclusions, gemologists will suspect the gemstone to be synthetic or treated. In some cases, inclusions can actually add to a gemstone’s beauty and value.
Special, needle-like inclusions cause the spectacular optical phenomenon called cat’s eye and asterism, displayed by Chrysoberyl and Corundum mineral families (sapphire and ruby)
Since colored gemstones are created by a variety of geologic processes, it’s common for some type of gemstones to have more inclusions than others. For example gemstones like Aquamarine, Citrine, Tanzanite, Topaz and Kunzite are typically eye clean while gemstones like Emerald, Ruby and Sapphire most likely have visible inclusions, especially on a microscopic level.