Lesson 2: Gemstone Hardness and Wearability


Step 1: Introduction to Gemology

Lesson 9

Did you know that the particles of dust you see floating in the air and settling on tables contain quartz? This mineral has a hardness of 7 to 7.5 on the Mohs scale. That means the quartz in dust makes those particles hard enough to actually remove the finish from your car and the polish from your table. Dust can even cut glass. Everyday hazards such as this make gemstone hardness an important consideration when designing and wearing jewelry.

You may know that diamond, with a hardness of 10, is the hardest material in the gem world. However, there’s an old saying among gemologists:

If you hit a diamond with a hammer, it’ll shatter into a dozen pieces. Hit a piece of quartz with a hammer, it’ll split in two. Hit a piece of jade with a

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