Advanced Search

GIA Names New Mineral Crowningshieldite

Oct 10, 2018 7:56 AM   By Rapaport News
Comment Comment Email Email Print Print Facebook Facebook Twitter Twitter Share 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
Rapaport TradeWire June 13, 2019
Jun 13, 2019
Industry Retail Mining General Finance June 13, 2019 RAPAPORT MARKET COMMENT Disappointing Las Vegas
Rapaport TradeWire June 6, 2019
Jun 06, 2019
Industry Retail Mining General Finance June 6, 2019 RAPAPORT MARKET COMMENT Slow trading at JCK show
Comments: (0)  Add comment Add Comment
Arrange Comments Last to First
© Copyright 1978-2019 by Martin Rapaport. All rights reserved. Index®, RapNet®, Rapaport®, PriceGrid™, Diamonds.Net™, and JNS®; are TradeMarks of Martin Rapaport.
While the information presented is from sources we believe reliable, we do not guarantee the accuracy or validity of any information presented by Rapaport or the views expressed by users of our internet service.