opal

Step 1: Introduction to Gemology Lesson 16 Back to syllabus Gemstone faceting is a marvelous amalgam of engineering and art. Through a mechanical…

All gemstones, from fragile opals to durable diamonds, can benefit from protective gem settings. Learn which jewelry designs are best suited…

Gem faceters and jewelry enthusiasts alike should learn about gemstone toxicity. This table has toxicity ratings for 280+ gems, based on their…

Although natural pearls are extremely rare and expensive, the availability of cultured pearls makes it easier to buy this classic, elegant gem…

Although many gems show a cat’s eye effect, when the term “cat’s eye” is used alone, it always refers to the rare gemstone chrysoberyl.…

A gemstone’s birefringence is a measure of its double refraction. Learn how to use it to identify gems and see the effects birefringent gems can…

What will 2018 bring to the world of gems and jewelry? Learn about the latest gem trends — everything from colors, designs, and settings to the…

Considering a conch pearl buying trip to the Caribbean? Quality factors for these gems differ from colored gemstones. Before you make a purchase,…

Explore the amethyst meaning and journey from ancient protection against drunkenness to spiritual symbol. Discover the legends, meanings,…