Made from two or more materials, assembled gems can make durable and affordable jewelry. Learn more about gemstone doublets, triplets, and other varieties.
In this golden age of pearls, a wide variety of shapes, sizes, and colors are available. Our pearl buying guide can help you select a pearl you’ll love.
Everything you ever wanted to know about calcareous concretions. Find value guides, scientific data, expert comments, and more in our Gemstone Listings.