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11 de mai. de 2024 · In addition to her volunteer work, Opal Stone Perlman is also a member of several professional organizations, including the Gemological Institute of America (GIA) and the American Gem Society (AGS). These organizations are dedicated to promoting the field of gemology and ensuring that the public has access to accurate information about gemstones.
22 de mai. de 2024 · Paula Crevoshay described 2018 as an “opulent year” and showed us several new pieces that celebrate nature. Her remarkable use of color draws in and enchants the viewer. She is working on a museum exhibition concept entitled Nature Art Science, with the intent of capturing how art is inspired by nature and how science is essential in the ...
Há 3 dias · Nigerian sapphires are typically dark blue, although goods found in the southeastern part of the country tend to be lighter in color. Parti-colored, yellow, purplish, and green sapphires are also common. Figure 2. This necklace makes use of the Arewa knot, a symbol of unity. Photo by Kevin Schumacher.
13 de mai. de 2024 · Nathan Renfro and John I. Koivula. Figure 1. This negative crystal in a diamond is colored green by radiation staining and contains a loose green diamond crystal. Photomicrograph by Nathan Renfro; field of view 4.23 mm. Diamond inclusions are relatively common guests in diamond crystals.
Há 6 dias · Designs from Erica Courtney. Jennifer Stone-Sundberg and Andrew Lucas. Download PDF. Figure 1. Left: Erica Courtney’s Victoria pendant showcases a 114.56 ct colorless topaz with a 2.76 ct Mahenge spinel set above it, surrounded by 86 Mahenge spinels, 20 rubellites, 10 Mandarin garnets, and 558 diamonds. Right: The Autumn pendant contains a 47 ...
Há 5 dias · At the AGTA show, Bridges Tsavorite unveiled the largest known square cushion-cut tsavorite, weighing 116.76 ct (see above). The 283.74 ct rough stone was mined by the company in Merelani, Tanzania, in September 2017. Bangkok-based gem cutter Victor Tuzlukov cut the stone at Bridges Tsavorite’s Arizona office over the course of a month in 2018.
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.
