RapNet


Rapaport News

 

Research

 
Rapaport 宣傳
Martin Rapaport’s Webinar on Estate Jewelry
October 30 2019

高級搜尋
最新文章
視訊
功能
新聞
挖掘
原石市場
拋光市場
製造
零售

GIA Names New Mineral Crowningshieldite

Scientists identify material while examining inclusions in Letšeng diamonds.
Oct 10, 2018 7:56 AM   By Rapaport News
Print 列印 Facebook Facebook Twitter Twitter 共用 Share


RAPAPORT... The Gemological Institute of America (GIA) has discovered a new mineral while studying flaws in large diamonds from the Letšeng mine.

The organization named the substance crowningshieldite after G. Robert Crowningshield. The 50-year GIA veteran and pioneer of gemological research wrote the first report on gem-quality laboratory-grown diamonds in 1971, the GIA said Tuesday.

Crowningshieldite is a nickel sulfide mineral with a hexagonal crystal structure, and forms when diamond inclusions undergo chemical modifications. GIA research scientist Evan Smith and his team, together with researchers at the University of Padova, identified the compound in two stones from Gem Diamonds’ mine in Lesotho, which is known for producing sizeable diamonds. They came across the mineral while examining inclusions in CLIPPIR (Cullinan-like, large, inclusion-poor, pure, irregular and resorbed) diamonds, a variety of large, high-quality, type IIa stones that form at significantly greater depths than most diamonds do.

“Discoveries such as this propel our understanding of diamonds and the earth forward,” said Tom Moses, the GIA’s executive vice president and chief laboratory and research officer. “This is why research is the cornerstone of GIA’s mission. I can think of no better way to honor Mr. Crowningshield’s legacy.”

The International Mineralogical Association accepted crowningshieldite as a mineral on September 18, the GIA added.

Main Image: Diamond with crowningshieldite. R
ight: G. Robert Crowningshield. (GIA)
Tags: Crowningshieldite, G. Robert Crowningshield, Gemological Institute of America, GIA, International Mineralogical Association, Letšeng, Letšeng mine, Rapaport News, Tom Moses, University of Padova
Similar Articles
Comments: (0)  Add comment Add Comment
Arrange Comments Last to First



電洽: 1-702-893-9400
Member License Agreement   RapNet Trading Rules & Code of Conduct    私隱政策  
  
twitter twitter
關於 Rapaport
廣告業務