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Há 5 dias · In October 2018, a diamond weighing a remarkable 552.7 ct was recovered from the Diavik mine in Canada. This is by far the largest known gem diamond found to date in North America. It is nearly three times larger than the 187.63 ct Diavik Foxfire which was unearthed from the same mine in August 2015, and about twice the size of a 271 ct white ...
3 de mai. de 2024 · Gems & Gemology Challenge. The spring issue also offers the 2024 Gems & Gemology Challenge quiz. Score 75% or better and you’ll receive a certificate of completion; earn a perfect score and your name will be listed in the Fall 2024 issue. Entries for the Challenge must be submitted online by September 1, 2024. About the Author.
19 de mai. de 2024 · About GIA A Tradition Of Science and Education. Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.
3 de mai. de 2024 · Montana Sapphire at Obsessed Over Gems. Figure 1. Untreated Montana sapphire showing a variety of cuts and the range of in-demand green to blue hues available. The stones range in size from 3.34 ct (stone on the far right) to 5.78 ct (third from the left). Photo by Jennifer Stone-Sundberg; courtesy of Obsessed Over Gems.
22 de mai. de 2024 · GIA offers four Diploma Programs and six Certificate Programs for different durations. To be eligible for the same, the candidates must possess a 10+2 qualification and must be over 18 years of age. Admission is granted on the basis of merit and the submission of application form with the requisite fee and documents. Table of Content.
14 de out. de 2013 · John Woodmark, president of Desert Sun Mining and Gems (Depoe Bay, Oregon), updated us on the Ponderosa mine, which he calls the most productive source of Oregon sunstone (see above). Demand has increased annually over their 17 years of production, he said. With the larger excavator and high-capacity screen they brought on in 2015, they now ...
Há 1 dia · GIA は、独自の画期的な研究から開発され、業界をリードする専門家が提供するカリキュラムを使って、世界でも有 数の宝石とジュエリーの教育を提供しています。. GIA の教育では、宝石やジュエリーに対する情熱をやりがいのある仕事へと繋げるために ...
