amethyst

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

Step 5: Advanced Gem Information Lesson 2 Back to syllabus Synthetic diamonds aren’t new. General Electric (GE) has been making them since…

Although gemologists look at color, clarity, cut, and carat to evaluate both diamonds and colored gems, they must judge these qualities in the…

Step 4: Gem Grading Lesson 3 Back to syllabus In recent decades, something remarkable invaded the thinking process of the colored stone industry.…

Step 4: Gem Grading Lesson 4 Back to syllabus Few gemologists deal strictly with loose stones. Occasionally, most may have to grade set gemstones.…

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…

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 29 Back to syllabus We’ve designed a series of realistic gem identification quizzes for gemology students.…