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Ruby
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
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Update on Gemstone Mining in Luc Yen, Vietnam
Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline, and other colored stones.
Rubies from the Montepuez Area
In October 2013, GIA’s Bangkok laboratory produced a study of the samples collected during the September 2012 expedition.
Winter 2012 Gem News International
Summer 2012 Gem News International
Winter 2010 Gem News International
Gem Localities of the 2000s
The past decade saw some impressive discoveries of diamonds and colored stones.
Gemstone Enhancement and its Detection in the 2000s
Advances in technology and increased demand for lower-priced gem materials contributed to the proliferation of new treatments throughout the first decade of the 2000s.
Winter 2009 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Ruby and Sapphire Production and Distribution: A Quarter Century of Change
During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.
Rubies and Sapphires from Winza, Central Tanzania
Since late 2007, rubies and sapphires have been mined by hand methods from both eluvial and primary deposits at Winza in central Tanzania.
Identification and Durability of Lead Glass–Filled Rubies
In early 2004, the GAAJ laboratory in Japan issued a lab alert about rubies they had seen that had large numbers of fractures filled with high-lead-content glass, which made them appear very transparent.
