opal

Distinguishing natural from synthetic gems is a critical skill for gemologists. It could mean the difference between valuing a gemstone at thousands…

Some optical effects in gemstones, such as color, brilliance, and dispersion, can be quite impressive. However, not all optical effects are considered…

Step 6: Appraising Lesson 2 Back to syllabus Appraising gems and jewelry involves giving an opinion of value. If you take a pair of earrings to a jewelry…

What color is the gem on the left? If you answered red, you’re wrong. It’s orange. Most people think the color of the gem on the right…

Don’t underestimate the importance of clarity, one of the Four Cs of gemstone grading. For faceted gems, basic clarity grading involves…

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.…