Article Search Results

A large red-orange crystal of wulfenite is nestled in the arms of matrix.

Article

Arizona Road Trips: Wild West Gem and Mineral Localities

Sharon Bohannon, November 18, 2019

Arizona’s scenic desert and mountain landscape is the perfect backdrop for a modern Wild West road trip in search of gem and mineral treasures.

An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road

H. Albert Gilg, Karl Schmetzer, and Ulrich Schüssler, August 6, 2018

Analyses the chemical composition and inclusion characteristics of this ancient artefact.

Multi-colored gems are superimposed on an image of glacier peaks.

Article

Gems and Minerals from the Sub-Arctic

Sharon Bohannon, March 17, 2017

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

Mexican Demantoid from New Deposits

Mikhail Ostrooumov, February 1, 2016

Skarn deposits in the Veracruz state of Mexico yield new demantoid material.

Article

Shenzhen: The Frontier of China’s Gem and Jewellery Industry

Tao Hsu, January 25, 2016

All jewellery professionals are familiar with the city of Shenzhen, a global jewellery manufacturing centre and a leader of China’s fast-growing gem and jewellery industry. Join the GIA team as we tour the city and discover more about its leading jewellery brands.

First Discovery of Topazolite in Mexico

Mikhail Ostrooumov, October 31, 2014

Reports on the first discovery of fine topazolite garnet crystals in Mexico.

New Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar

Karl Schmetzer, Thomas Hainschwang, June 1, 2002

Pyrope-spessartine garnets from Tranoroa, in southern Madagascar, contain appreciable Cr and somewhat lower V contents.

Pink to Pinkish Orange Malaya Garnets from Bekily, Madagascar

Karl Schmetzer, Thomas Hainschwang, December 1, 2001

Malaya garnets from Bekily, Madagascar, are predominantly pink to pinkish orange, with some stones orange to red.

Spessartine Garnet from Ramona, San Diego County, California

Brendan M. Laurs, Kimberly Knox, December 1, 2001

For most of the 20th century, the principal source of fine spessartine was the area around the Little Three mine near the town of Ramona in southern California.

Garnets from Madagascar with a Colour Change of Blue-Green to Purple

Karl Schmetzer and Heinz-Jürgen Bernhardt, December 1, 1999

Gemmological, chemical, spectroscopic and microscopic properties of blue-green colour-change garnets from a new deposit near Bekily, Madagascar, are given.

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