Impossible Diamond Color Quiz
Test your ability to sort diamonds by color with our fun and quick Diamond Color Sorting Quiz. Learn a thing or two about diamond colors while you do.
Related Articles
How Do Zircons Form?
As a December birthstone, blue zircon is very popular. But are blue zircons natural? Learn how zircons form and get...
Read More
What is a Mineral?
How do scientists define a mineral? Learn what minerals are made of, the difference between gemstones and minerals, and their...
Read More
What is Jedi Spinel?
Jedi spinel makes a beautiful jewelry stone. Learn how it got its name and what qualities make this vivid pinkish...
Read More
Natural Radiation and Gemstone Color
Natural radiation can create beautiful colors in many gemstones. Learn how natural radiation works and the gems most commonly affected...
Read More
Latest Articles
Celebrity Engagement Rings
What stones are the trendsetters using to pop the question? Take a look at the diamonds and colored gems in...
Read More
Ruby and Sapphire Grading Tools
What ruby and sapphire grading tools does a novice gemologist need? Learn how basic gemological equipment can help you identify...
Read More
Cerussite Value, Price, and Jewelry Information
As beautiful as a diamond, a faceted cerussite actually has higher dispersion and usually excellent transparency, colorless or light body...
Read More
Ouro Verde Quartz: History and Treatment
Ouro Verde quartz, also known as lemon quartz, is a popular treated stone. Learn how experiments with other gems led...
Read More
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!