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 …

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

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. …

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 …

2016年6月21日 · 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 …

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, …

2013年11月14日 · 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, …

2016年11月7日 · 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 …

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 …

2017年10月11日 · The alluvial gravels of this “jewel box of the Indian Ocean” have been producing bright, transparent gems for more than 2,000 years. Traders also carried fine …