How to Buy Colored Stones

The Art of Choosing Well

As with diamonds, the 4Cs (color, cut, clarity and carat weight) also apply to gemstones—both precious and semiprecious. However, of the 4Cs, color is the most important factor in determining a gemstone’s value. There are four main factors used by gemologists to evaluate a gemstone's color: hue, saturation, tone, and distribution.

In addition, other considerations in choosing a colored stone include treatments used on natural stones to enhance their appearance, the hardness of the stone and whether or not the stone was created in a laboratory.

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