Ruby: One of the Original Precious Gems
By Andrea Venn, Ph.D., CGA, JEA If you’re looking to enhance your jewelry collection with one of the original precious gems, ruby may be the perfect fit for you. Ruby is the red form of corundum. Corundum can be seen in multiple hues due to trace elements. The trace element chromium gives corundum its red color, and it can also cause fluorescence, which further enhances the red hue. This separates ruby from all other colors of corundum, which are instead referred to as sapphire. The American Gem Society specifies that ruby must be a medium or darker tone of red,