October Birthstones: Pink Tourmaline and Opal
Discover the beauty and meaning of October birthstones: pink tourmaline and opal. Learn about their unique characteristics, origins, durability,…
February Birthstone: Amethyst
Amethyst, the February birthstone, comes in beautiful purple colors and makes a durable jewelry stone. Learn more about this wonderful gem.
Gem Formation: How are Gemstones Created?
Gem formation usually involves mineral crystallization and other geological processes. Learn how these affect the gemstone properties gemologists…
Spinel Buying Guide
Master spinel buying with our comprehensive guide covering the 4 Cs, color grading, pricing, origins, and how to identify quality natural vs synthetic…
Choosing the Best Colored Gemstones for Engagement Rings
Looking for alternatives to a classic diamond engagement ring? Learn about your options and see some wonderful photos of colored gemstone engagement…
Jewelry Nomenclature: Gem Bracelets and Necklaces
Bracelets and necklaces share much of their terminology. Learn the names and functions of the different parts of these popular types of jewelry…
Tugtupite Value, Price, and Jewelry Information
Gem collectors prize tugtupite, the “Reindeer Stone,” for its rich colors and intense reaction to ultraviolet light. Sporadically used in jewelry,…
Colorful Options: Choosing Topaz Engagement Ring Stones
You can probably find a topaz engagement ring stone in your favorite color at a reasonable price. Learn what to look for and how to care for your gem.…
IGS Become Member