Advice for Determining Gemstone Value

Step 4: Gem Grading

Lesson 9

gemstone value - tourmaline Tanzania
“Chrome Tourmaline,” elongated emerald cut, 0.47 cts, Tanzania. © Dan Stair Custom Gemstones. Used with permission.

Many new gemologists buy low-quality gems believing they’ve found a real bargain. However, judging gemstone value is very complex. You need to consider many factors before making a decision to buy. I’ve designed four exercises to help novices practice determining gem values.

Of course, these exercises have limits. You can’t always accurately judge gem colors through pictures on a computer monitor. Thus, when possible, I’ll give you image comparisons to work with. Also, values vary over time, so I’ll give you prices to use for each exercise.

Also, be sure to review these articles:

Is it Worth It? Four Gemstone Value Exercises

You’re looking for gems for your custom jewelry settings. …

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