Explore our curated collection of gemstones articles and guides.
Understand the distinction between precious and semi-precious gemstones — where the classification came from, why modern gemologists consider it misleading, and how gemstone value is actually determined.
Explore the world of agates — from banded and moss agate to fire agate and Lake Superior agate. Learn to identify different varieties, understand how agates form, and discover tips for building your collection.
Compare natural diamonds, moissanite, and lab-grown diamonds side by side. Understand the differences in brilliance, hardness, price, ethics, and durability to make an informed choice for your jewelry.
Discover the birthstone for every month of the year. Learn the history, geological properties, symbolism, and care tips for each birthstone — from January's garnet to December's tanzanite.
Explore the incredible world of quartz varieties — from amethyst and citrine to chalcedony, agate, and jasper. Learn about the properties, formation, and significance of every major quartz type.
Learn how to identify gemstones at home using simple tools and techniques. From scratch tests and streak tests to examining luster, color, and crystal structure — discover practical methods to determine what stones you have.
From the legendary Blue Diamond to the elusive Taaffeite, explore the ten most valuable gemstones on Earth and discover the geological rarity, optical phenomena, and market forces that make each one extraordinary.