jewelry

Two of the trickiest gemstone separations to make are scapolite from citrine and apatite from tourmaline. Learn some tips for distinguishing…

The GIA GemSet offered plastic color masters for color grading gems. It’s no longer in production. Software alternatives exist but still face…

Learn the scientific definition of crystal used by gemologists and answer some basic questions about what is and is not a crystal.

Looking for a fun summertime gem? Watermelon tourmaline adds a pop of color that’s perfect for a playful summer look. Learn about the quality factors…

What’s the difference between a reflectometer and a refractometer? If you’re interested in studying or buying gems, learn the facts here.…

The Concierge Gemologist provides in-home by appointment only professional jewelry services to private clients. Our goals are you help you achieve…

Gemstone identification can involve many tests. These quizzes can help novice gemologists learn to pick the appropriate ones and identify gems…

The Usambara effect is a gemstone color change phenomenon distinct from pleochroism or the alexandrite effect. Tourmaline and other species…

When buying gems, gemologists must temper their excitement with an analytical eye. Test your gem identification skills with these quizzes.