GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological information, a buyer’s guide, photos, videos & research.

Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.

Classification of Gem Materials Using Machine Learning. Explores the application of several machine learning models to complement traditional gem classification approaches. Read More

Gems found at the site include emerald, aquamarine, sapphire, garnet, topaz, amethyst, citrine, rutile and tourmaline. Prices depend on the type of digging you want to do. emeraldhollowmine.com

These gems are not only beautiful, but have a rich history and distinct gemological allure. The Crown of Queen Elizabeth The crown of Queen Elizabeth, the queen mother, features the famous 105.6 carat Koh-I-Noor diamond, which came to Queen Victoria in 1850 from Duleep Singh, the last Maharaja of the Sikh Empire.

Jun 21, 2016 · There is no single authoritative wedding anniversary gemstone list. However, based on similar lists that we’ve found, we’ve made some selections for wedding anniversary gems to help you find that perfect jewelry gift for your loved one. 1st Wedding Anniversary Gemstone: Gold

Around the world, Stone Age workers shaped this toughest of gems into weapons, tools, ornaments, and ritual objects. Their carvings invoked the powers of heaven and earth and mystic forces of life and death.

This unique assemblage encompassing a wide variety of gems from around the world shows fine examples of 16th and 17th century jewelry, including rings, chains, necklaces, pendants, buttons, brooches, hat or cloak pins, and watches.

Nov 14, 2013 · Dedicated to the earth sciences, it houses one of the world’s largest gem and mineral collections, including such world-famous gems as the Hope diamond, Logan sapphire, and Rosser Reeves star ruby, along with countless thousands of less-famous but equally spectacular gem and mineral specimens.

Nov 7, 2016 · The first edition of Gem: The Definitive Visual Guide is a visual encyclopedia driven by spectacular images of world-class gems, artifacts, and jewels. Developed in association with the Smithsonian, with a foreword by jeweler and scientist Aja Raden, the book is a good resource for amateur to professional gemstone lovers.