Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics
G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
Mixed-Type Cape Diamond
A Fancy orangey-yellow “cape” diamond featured an unexpected 480 nm band, a defect normally associated with orange colour.
An opal featuring a rare six-rayed star is examined in GIA's Bangkok lab.
Diamond with High Concentration of Nickel
Analysis of Fancy Light greenish yellow diamond leads to detection of nickel, as well as an inclusion that gives a colour-change effect.
Buff-Top Round Diamond
The New York lab recently examined several diamonds with an interesting variation on the cabochon.