Explore our curated collection of geology articles and guides.
Learn how to start a rock collection from scratch — where to find specimens, how to identify and catalog them, display ideas, essential tools, and tips for building a collection you will treasure for years.
Understand the fascinating science of crystal formation — from magmatic crystallization deep in the Earth to hydrothermal veins and evaporite deposits. Learn why crystals grow in specific shapes and what conditions produce the finest specimens.
Learn everything about the Mohs Hardness Scale — how it works, the ten reference minerals, practical applications in gemology and lapidary, and how to perform hardness tests on your own specimens.
Explore how igneous, sedimentary, and metamorphic rocks form, discover the rock cycle that transforms one type into another, and learn how plate tectonics and deep-Earth processes create the gemstones and minerals we treasure.