Gold: $1279.70 - as of: 11/21/2017
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GEMSTONES
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Color.The beautiful color of a gemstone is its most defining characteristic, and many jewelers consider it to be the most important evaluation criterion. When deciding upon gemstone color, examine the hue, tone, and saturation.

Hue. The most valuable gemstones are those that exhibit a pure color and only "slight" hues of other colors in addition to their primary color. For example, sapphires range in hue from purplish-blue to slightly greenish-blue and pink sapphires range from pink to slightly purplish-pink.

Tone.Tone represents the depth of color, ranging from colorless to black. Gemstone tone is described as "light," "medium-light," "medium," "medium-dark," and "dark."

Saturation.This refers to color purity, the degree to which the gem is free from brown or gray hues. The most desirable gemstones are often described as having "vivid" or "strong" color saturation.

Clarity.Because gemstones form under unique circumstances, each individual gemstone is comprised of a combination of trace minerals, which create a unique set of identifying marks or inclusions. When considering a colored gemstone's clarity, you should measure your expectations against the standard for that variety of gemstone. Some varieties of colored gemstones, such as aquamarine, blue topaz, and citrine, have naturally fewer inclusions while other gemstones, such as emerald and ruby, tend to have a higher rate of acceptable inclusions. Clarity is an important factor in comparing quality colored gemstones. Even opaque opals can have milky inclusions that will affect their iridescence and color play. In general, the best values are available in gemstones that are moderately included. Exceptional gemstones with few or no inclusions are available, but they can command extravagant prices.

Cut. Colored gemstones are generally cut to maximize the beauty of their color. To recognize quality in the cut of a gemstone, there are several considerations. A good cut showcases the gemstone's color, diminishes its inclusions, and exhibits good overall symmetry and proportion. Because gemstone color can vary, there are no hard geometrical standards when it comes to maximizing brilliance or color. Gemstones, especially rarer ones, are sometimes cut for size without regard for their color.

Size. The carat weight of a gemstone does not necessarily allow you to accurately envision the size of the gemstone. Different gemstones have different densities (mass per unit volume), so two gems that appear to be the same size may actually have very different weights.

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