aquamarine

Disclosing enhancements is one of the most important responsibilities gemologists face. In fact, many countries are passing stricter laws…

Use these gemology cheat sheets to review color and clarity grading, as well as special information on diamond and opal. You can also review basic…

Step 3: Practical Gemology Lesson 28 Back to syllabus While preparing this lesson in gemstone examination, I was in the process of professionally…

Step 3: Practical Gemology Lesson 30 Back to syllabus In this set of gemstone identification quizzes, I’m placing you in a familiar situation.…

Step 3: Practical Gemology Lesson 3 Back to syllabus Sometimes, refractive index (RI) and specific gravity (SG) readings aren’t enough…

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

Although gemstone magnetism isn’t a commonly tested gemstone property, it may be useful for making quick separations outside the lab. By Richard…

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…

I’ve faced many questions about the element chromium (Cr), the red coloration of minerals, and the gemstone red beryl. One of the many…