Lesson 6: A Beginner’s Guide To Common Gemstone Heat Treatments

Step 2: Advanced Gemology

Lesson 6

Gemstone heat treatments can turn mediocre pieces into items of great beauty. Heating a gem to a specific temperature and then cooling it is a common procedure in the gem world. This can improve a gem’s color and sometimes even its clarity. Such treatments do a number of good things for our budgets as well as the environment, since more rough material coming out of the ground becomes useful for its beauty. Here you’ll find a summary of the most commonly used gemstone heat treatments and tools as well as some safety tips for novice gemologists and gem cutters.

A Note On Corundum Heat Treatments

Ruby and sapphire are some of the most commonly heated gemstones. However, these gems aren’t discussed in this article. A standard electric oven can’t reach the temperatures needed to treat these corundum gemstones. A special oven …

Unearth The Secrets Behind The Beauty

Introducing "Discover Gemology" by IGS, the premiere introductory training for those fascinated by the magnificent world of gemology.

  • How to spot the most unique & valuable characteristics of different gemstones
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Course: Discover Gemology: Fundamentals, Tools & Meanings
Purchase Course: $49
Skill Level: beginnner
Lessons: 48
Time: 480 min