pink gems

How do gemologists distinguish between rubies and pink sapphires? Learn about the chemistry of corundum and the history of the color pink.

Why are some gems so rare in nature? Learn which elements in the Earth’s crust are the rarest and how these ingredients help form uncommon gemstones.…

How do you make money investing in gems? What should you buy, for how much, and how can you add value to your investments? Learn these top 5 rules.

Take a look at these before-and-after pics of repaired and recut gems and learn how a great lapidary can improve the value of many types of gems.

White diamonds surround this large, 1.17-ct cushion cut fancy pink diamond. “Pink Blush” © Dalby Diamonds. Used with permission.…

Most gems form naturally as minerals within the Earth. Most form as crystals, solids whose atoms are arranged in highly ordered repeating patterns…

Step 2: Advanced Gemology Lesson 2 Back to syllabus The optical properties of gems attract our eyes and can give a cut stone a unique character. However,…

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…