Resultado da Busca
Há 4 dias · Gems & Gemology is redesigned, printed in full color, and goes on to win 15 awards for excellence during the next 20 years 1982 GIA Celebrates its 50th Anniversary with the first International Gemological Symposium
Há 5 dias · Peridot Description. While the 64.57-carat cut peridot is magnificent, it is overshadowed by the amazing. 7.9-cm tall crystal. Both are from Sappat, Kohistan, Pakistan. - Jeffrey Scovil. Gem miners find peridot as irregular nodules (rounded rocks with peridot crystals inside) in some lava flows in the United States, China, and Vietnam and, very ...
Há 3 dias · This 12.61 ct blue sapphire and 7.90 ct orange sapphire recently mined by Potentate show that large material still comes out of Rock Creek, Montana. Photo by Eric Welch/GIA, courtesy of Potentate Mining. Potentate Mining marketing director Warren Boyd presented two magnificent sapphires (figure 1) and a suite of fancy sapphires extracted from ...
Há 2 dias · Elusive also produces boulder opals with a flame-like pattern (figure 2), which Griffin said is unique to this mine. He added that because the stones were found at a shallow depth and the area is dry, they are stable and will not craze or crack. Rod Griffin talks about his background in opal mining and his plans for mining in Quilpie this year.
Há 2 dias · Colombia’s Coscuez mine, worked by Fura Gems since early 2018, produced the stunning emerald rough shown here. These specimens range in weight from 0.089 to 1.279 g (0.445 to 6.397 ct). Photo by Kevin Schumacher. We had the opportunity to talk with Rupak Sen, vice president of sales and marketing for Fura Gems in Dubai.
Há 5 dias · Oregon Sunstone Update. Figure 1. Fashioned by lapidary Jean-Noel Soni, this 35.50 ct mixed-cut sunstone is reportedly from a mine on Eagle Butte, in Oregon’s remote Harney Basin. Photo by Robert Weldon/GIA; courtesy of Suncrystal Mining. At the GJX Show, Nirinjan Khalsa (Suncrystal Mining, Lake and Harney Counties, Oregon) showed us a ...
Há 5 dias · Figure 1. Left: This 4.37 ct unheated bicolor sapphire from the Potentate mine in Montana features Jeff Hapeman’s signature Helena cut. Courtesy of Jeffrey R. Hapeman, Earth’s Treasury. Right: A 4.57 ct heated blue sapphire from Potentate. Photo by Kevin Schumacher. Jeff Hapeman of Earth’s Treasury (Westtown, Pennsylvania) loves a ...
