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Há 3 dias · Todd’s Gems. Todd Wacks outlines how garnets believed to be “regular” Tanzanian rhodolite when discovered in the late 1980s turned out to be rare color-change pyropes instead. In this video, he demonstrates their strikingly intense pink-to-purple color change under different light sources. The gems were pinkish purple in daylight and ...
Há 1 dia · Diamond Clarity. Natural diamonds are the result of carbon exposed to tremendous heat and pressure deep in the earth. This process can result in a variety of internal characteristics called 'inclusions' and external characteristics called 'blemishes.'. Evaluating diamond clarity involves determining the number, size, relief, nature, and ...
Há 3 dias · Explore the fascinating world of gems and jewelry as you participate in immersive, hands-on experiences and learn more about GIA gemology and jewelry design programs. Location. GIA Hong Kong School. 3rd Floor, New World Tower II. 18 Queen’s Road Central, HK. Date.
Há 4 dias · About Us. Mission Statement. Midwest Gemological Services is here to provide detailed, accurate and professional independent estate and insurance appraisals for all types of jewelry and watches to private and professional clients. Professional Titles. MGS’s gemological laboratory is fully portable and is available for “on-site” appraisals.
Há 2 dias · Begin by inserting and tightening a silicon carbide separating disk in a No. 30 hand piece of a flex shaft. Secure the worn drill bit in a screw mandrel and brace against the bench pin as you position the bit to be filed on the relief area. Carefully lower the separating disk to lightly touch the targeted surface.
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 ...
Há 4 dias · Mexican Opal – Tucson 2014. Figure 1. This rhyolite matrix specimen contains opal-filled cavities displaying play-of-color. Photo by Eric Welch; courtesy of Opalos & Artesanias Mexicanas. Jorge Tamayo Carrillo (Opalos & Artesanias Mexicanas, Magdalena, Mexico) outlined current production of fire opal at his family’s mine, located 10 km ...
