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 …

Glowing Gems: Fluorescence and Phosphorescence of Diamonds, Colored Stones, and Pearls. Photoluminescence imaging, which analyzes how gemstones glow under ultraviolet light, is an …

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 …

Just as you consult with other professionals for important advice, such as a family doctor or lawyer, you should turn to a professional jeweler to make a jewelry purchase a pleasurable …

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. …

Despite the dissolution of most European monarchies in the early twentieth century, gems and jewels with true royal provenance have occasionally come up for public sale, either kept by …

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, …

In this regard, Louis XIV proved to have eclectic tastes, collecting both minimally faceted (possibly Mogul) gems such as the Grand Sapphire and complex brilliant-cut faceted gems such as the …

Brightly colored gems and enamel symbolized the forces of life: red as blood, the life force of the animal kingdom; green as the plant life created by the blue sky combined with the yellow sun. …