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Appraising Blue Sapphires

Appraising blue sapphires is a critical skill for any jeweler or gemologist. Learn the basics you’ll need to evaluate one of the most popular…

Price and Value: Factory-Cut vs Custom-Cut Gemstones

How does faceting affect gem value? Custom-cut gemstones are unique pieces and command a high price. Learn how custom cutting compares to factory…
Eight Famous Rubies

Blood red ruby gems have captivated people’s hearts and imaginations for centuries. Read about these eight famous rubies and what makes them special.…

Pearl Value, Price, and Jewelry Information

Pearls are the only gems found within living creatures, both salt and freshwater mollusks. However, most pearls on the market today are cultivated,…

Ruby and Sapphire Grading Tools

What ruby and sapphire grading tools does a novice gemologist need? Learn how basic gemological equipment can help you identify these popular…

Calcareous Concretions Value, Price, and Jewelry Information

Several species of marine mollusks produce stony growths called calcareous concretions or non-nacreous pearls. Varieties such as conch pearls,…

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