Rubies have long been valued for their incredible hardness and bright color. Unlike some gemstones, they are not graded on a precise, universal scale, but there are still several characteristics most jewelers use to rate a ruby's quality. Learn how to identify the quality of a ruby, select a setting for a piece of jewelry, and find out more about how rubies are mined or manufactured. Some ruby mines are associated with human rights abuse or environmental disasters, but there are several alternative sources that avoid contributing to these issues.
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