Micro-Magma Chambers in Natural Rubies and Sapphires: The Behavior of Some Mineral Inclusions in Corundum At High Temperatures

John I. Koivula

May 27, 2009

Download PDF

Examines the effect that heat-treating has on preexisting solid inclusions, and how to distinguish these damaged inclusions from the results of flux healing or other forms of artificial infilling.

Ongoing Research

Explores the usefulness of this technique in the mapping of defects and spectral features, the determination of color origin, and the identification of synthetic and treated diamond melee.

Ren Lu

Jan 9, 2013

Vincent Pardieu and Nirina Rakotosaona

Oct 15, 2012

Elise A. Skalwold, Nathan Renfro, Christopher M. Breeding, and Jim Shigley

Jul 25, 2012

Al Gilbertson and Ilene Reinitz

Jun 13, 2012

Details the sapphire mining and trading situation at this newly discovered deposit, including descriptions of the area's geology and samples observed during the expedition.

Vincent Pardieu, Emily V. Dubinsky, Supharart Sangsawong, and Boris Chauviré

May 2, 2012

Micro-Magma Chambers in Natural Rubies and Sapphires: The Behavior of Some Mineral Inclusions in Corundum At High Temperatures

You Might Also Like

Join Us atConverge

Learn About Education On Campus and Online

Explore GIA Laboratory Promotional Offers

Shop theGIA Store

Join Us at
Converge

Shop the
GIA Store