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Garnet Crystal Inclusion Photomicrograph

Colour-Change Garnet in Diamond

Meenakshi Chauhan, October 31, 2014

This diamond contained an inclusion of pyrope-spessartine garnet that appeared greyish green in fluorescent light and purplish red in incandescent light.

Unusual Dumbbell-Like Inclusion in Diamond

Emmanuel Fritsch and Aurélien Delaunay

Examination of a 0.40 ct near-colourless round brilliant diamond with a large inclusion resembling a dumbbell

Bright yellow diamonds from Sierra Leone

James Shigley and Christopher M. Breeding, January 31, 2014

Examination of strongly yellow diamonds from the Zimmi area of Sierra Leone revealed graphitised feather inclusions.

Undisclosed Samples of Large CVD Synthetic Diamond

Hiroshi Kitawaki

In mid-2012, one of the international diamond grading laboratories in Antwerp reported undisclosed CVD synthetic diamonds, causing a stir in the diamond industry.

This 1.04 ct black submetallic round brilliant, initially represented as diamond, was identified as boron carbide. Photo by G. Choudhary.

Boron Carbide: A New Imitation of Black Diamond

Gagan Choudhary, October 17, 2013

The Gem Testing Laboratory in Jaipur identified a black diamond-like specimen as boron carbide, a ceramic material typically used in nuclear, military, and aerospace applications.

Demantoid garnet fossil pseudomorphs

Emmanuel Fritsch, Julien Raoul, Benjamin Rondeau, and Olivier Segura, January 31, 2014

In these two extremely rare specimens, demantoid garnet has replaced coral and gastropod fossils.

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