A: Emerald is the clear green gem and a rare variety of the relatively rare mineral beryl. This fairly hard mineral is composed of four elements—beryllium, aluminum, silicon, and oxygen.
The emerald's beautiful color is due to trace amounts of two other elements—chromium and/or vanadium. These elements give emerald a red fluorescence that enhances the luminosity (brightness) of its blue-green color.
Emerald is the third most valuable gemstone, after diamond and ruby. The highest price paid for an emerald is U.S. $1.5 million for an exceptional 10.11-carat Colombian specimen in 2000. Unlike other gemstones, the color of an emerald is more highly valued than its clarity or brilliance.
This gem is also featured prominently in God's Word, even more than diamonds. For instance, God told Moses to set an emerald among the twelve precious stones, along with a sapphire and a diamond, in the high priest's breastplate.
Learn how these gems were formed and what makes them so precious. 
Geology: A Biblical Viewpoint on the Age of the Earth (5-DVD boxed set) Learn about the cataclysmic Flood of Noah's day that produced many of the gems and rock layers we see today. In this five-DVD set, renowned creation geologist Dr. Andrew Snelling
looks in depth at topics of the Genesis Flood, age of the earth, radiometric dating, radiohalos, and Grand Canyon geology.
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