List of Gemstones: Precious and Semi-Precious Stones - Explore further
Traditionally, precious stones were the Big Four gemstones — diamonds, emeralds, rubies, and sapphires. Semi-precious stones were everything else. Today, gemologists don't use these terms because they imply that some gems are better or worth more than others. In fact, some so-called semi-precious stones would be worth far more than so ...
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