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Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics

Russell Shor, June 12, 2015

G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.

Purple Jadeite Rock

Amy Cooper and Tara Allen, October 17, 2013

Detected mineral components—jadeite and quartz, with reddish orange portions of cinnabar—shed light on a purple bead’s possible origin.

Diamond with High Concentration of Nickel

Troy Ardon, October 17, 2013

Analysis of Fancy Light greenish yellow diamond leads to detection of nickel, as well as an inclusion that gives a colour-change effect.

Silicon in natural Type IIa and Type IaB diamond

Ulrika D'Haenens-Johansson, Manisha Bhoir, and Kyaw Soe Moe, January 31, 2014

Silicon, normally associated with CVD synthetic diamonds, may be found in natural diamond.