Russell Shor, September 20, 2019
GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.
Read MoreSharon Bohannon, August 21, 2017
These red, pink and orange hued gems evoke passion and excitement – and are sure-fire accessories for sultry summer days.
Read MoreGIA, September 29, 2014
Once upon a time, gem cutting was a strict craft bound by centuries of tradition. Then Bernd Munsteiner (b. 1943) invented the fantasy cut.
Read MoreWilliam B. (Skip) Simmons, et al., June 1, 2005
The Mt. Mica area in southwestern Maine has been mined for tourmaline and other pegmatite gems since the 1820s.
Read MoreDona M. Dirlam, Brendan M. Laurs, March 1, 2002
Liddicoatite, a calcium-rich lithium tourmaline, was recognised as a separate mineral species in 1977, and named in honour of Richard T. Liddicoat.
Read MoreJames E. Shigley, Brian C. Cook, December 1, 2001
“Paraíba” tourmalines continue to be recovered in small amounts from north-eastern Brazil.
Read MoreMary L. Johnson, Cheryl Y. Wentzell, September 1, 1997
Tourmalines from an alluvial deposit near Lundazi in Zambia consist of colour-zoned pink/colourless/yellow-green “watermelon” nodules.
Read MoreFranz Brandstätter and Gerhard Niedermayr, September 1, 1994
Inclusions of native copper and tenorite (CuO) were found in greyish-green elbaite from São José da Batalha, Paraíba, Brazil.
Read MoreEmmanuel Fritsch, James E. Shigley, September 1, 1990
Unusually vivid tourmalines from the state of Paraiba, in north-eastern Brazil, have attracted great interest since they first appeared on the international gem market in 1989.
Read MoreSally A. Thomas, March 1, 1987
A review of mid-20th century jewellery styles.
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