Chunhui Zhou, Gregory Hodgins, Todd Lange, Kazuko Saruwatari, Nicholas Sturman, Lore Kiefert, and Klaus Schollenbruch, November 8, 2017
Examines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.
Read MoreEvan M. Smith, Steven B. Shirey, and Wuyi Wang, November 8, 2017
Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.
Read MoreScott D. Sucher, September 1, 2009
This study uses both historical information and modern data to create a computer model of the Tavernier Blue, orienting the finished diamond within the original diamond crystal.
Read MoreKenneth Scarratt and Russell Shor, June 1, 2006
Eight decades after the Cullinan diamond was mined, a team of gemmologists examined the two famous gems that were created from it to become part of the Crown Jewels of England.
Read MoreJohn M. King and James E. Shigley, June 1, 2003
The stories behind seven strikingly beautiful rare natural diamonds, united in an exhibit at the Smithsonian, are told here.
Read MoreCharles I. Carmona, September 1, 1998
Updated formulas are presented for estimating the weights of mounted coloured gemstones.
Read MoreAkiva Caspi, June 1, 1997
Over the last 25 years, the diamond-cutting industry worldwide has been revolutionised by sophisticated instruments that provide invaluable aid in the process of creating a polished gem.
Read MoreA.J. A. (Bram) Janse, March 1, 1996
This article explores the mining developments and new diamond occurrences in Africa that led to many of the key concepts in modern geology.
Read MoreWilliam E. Boyajian, September 1, 1988
The diamond industry has been buffeted by extreme price volatility during the last decade, unlike any encountered since the Great Depression of the 1930s.
Read MorePeter C. Keller and Wan Guo-dong, March 1, 1987
One of China's most important discoveries to date is the Changma kimberlite district in Shandong Province.
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