Demantoid Garnet: The Legendary Gemstone Aroused from a Century of Sleep Masashi Furuya. Exotic gems (Volume 2) Renée Newman. Garnet John D. Rouse. This Month's Featured Gems. Peridot. Found in lava, meteorites, and deep in the earth’s mantle, yellow-green …

Demantoid is a rare and famous green garnet, spessartine (also called spessartite) is an orange garnet, and rhodolite is a beautiful purple-red garnet. Garnets can even exhibit the color-change phenomenon similar to the rare gemstone alexandrite. All garnets have essentially the same crystal structure, but they vary in chemical composition.

Back to gem encyclopedia Garnet. Garnets are a set of closely related minerals forming a group, with gemstones in almost every color. Intense. The best colors for spessartine are vivid orange to orangy red. Clean. No eye visible inclusions present is rare for spessartine. Bright.

Garnet Birthstone Meaning & History. The name “garnet” originates from the medieval Latin granatus, meaning “pomegranate,” in reference to the similarity of the red color. Garnets have been used since the Bronze Age as gemstones and abrasives. Necklaces studded with red garnets adorned the pharaohs of ancient Egypt.

Antique Pyrope Hairpin in the collection of the Smithsonian National Museum of Natural History - Chip Clark, courtesy Smithsonian Institution Thousands of years ago, red garnet necklaces adorned the necks of Egypt’s pharaohs, and were entombed with their mummified corpses as prized possessions for the afterlife. In ancient Rome, signet rings with carved garnets were …

These gemstones come in almost every color. Red is the most common garnet color, and is found in metamorphic rocks around the world. Other colors like green, orange, and purple-red are less common and more valuable. Colors Many people with a favorite color will pick red, yellow, green, blue, pink, gray, orange, brown, or purple. ...

Garnet comes in as wide a variety of sizes and shapes as it does colors. Garnets are a group that includes a number of different minerals, so appearance can vary widely. ... This tsavorite garnet has an appealing green color and is a 68.82-carat gem. - Courtesy New Era Gems. This 3.20-carat demantoid garnet’s vivid green hue is exceptionally ...

Often thought of as a deep red gemstone, garnet can also be yellow, orange, green or brown – any color except blue. There are six common garnet minerals – almandine, andradite, grossular, pyrope, spessartine and uvarovite – and several rare species. Gem varieties include green demantoid and tsavorite, orangy red hessonite and pink/red ...

Gem Encyclopedia is a virtual journey through the science and lore of Gemstones from across the globe. Each Gem page features Gemological Information, a Buyer’s guide, photos, videos & research. ... The garnet group of related mineral species offers gems of every hue, including fiery red pyrope, vibrant orange spessartine, and rare intense ...

the characterization of gem garnets. - -- ABOUT THE AUTHORS Dr. Manson is director of research and Ms. Stockton is research gemologist at the Gemological Institute of America, Santa Monica, CA . 'I7 982 Gemological Institute of America T he garnet group of minerals encompasses both com- plex variations in chemical composition and a wide