Learning Center

Questions About Gems and Jewelry

Can Diamonds Burn?

Diamonds may form under intense heat and pressure, but under certain conditions, diamonds burn.  Learn the science behind a diamond’s fiery…

Do Natural Rubies Fluoresce?

Both natural and synthetic rubies fluoresce under UV light. Learn how slight differences in fluorescence patterns can help gemologists distinguish…

Are Serengeti Rubies Real Rubies?

Although Tanzania is a source of rubies, so-called Serengeti rubies are more likely to be garnets. Learn more about rubies and misleading gem names…

Is Uranium Glass Safe To Facet?

Uranium glass, or Vaseline glass, is a prized collector’s item and is generally safe to handle. But is it safe to facet? Learn about the potential…

What Causes Emerald Fractures?

Emeralds get their green color from chromium and vanadium. Learn how the presence of these elements affects their formation and causes emerald…

What Is A Chameleon Diamond?

A classic chameleon diamond can change color from green to yellow under certain conditions. Learn more about this process and other color change…

How To Dry Opals Safely

Opals should be handled with care. If you buy opals that have been kept in water, follow these instructions to dry them safely.

Sphalerite Appraisal

Learn what factors most influence a sphalerite appraisal and what kind of jewelry will best showcase this beautiful gemstone.

Opal Jewelry Tips

Opal jewelry is lovely, but aren’t these gems prone to scratching and breaking? Learn the best ways to wear these colorful but delicate stones.…

What Is A Reflectometer?

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