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sapphire

Using the Refractometer

Step 3: Practical Gemology Lesson 4 Back to syllabus Gemstone identification is like detective work. You gather clues and eliminate suspects…

Optical Properties of Gemstones

We tend to take light for granted. It’s such a common thing we experience every day. Rarely do we think of the scientific definition of light…

Why Do We Need Tools for Gemology?

People often ask me about gem identification. More specifically, they ask me to identify their gems. Some think I can do this simply by looking at…

Gemstone Physical Properties

The optical properties of gems attract our eyes and can give a cut stone a unique character. However, gemstone physical properties are also important.…