Demantoid from Baluchistan Province in Pakistan
Nine demantoids reportedly from a new deposit in the Khuzdar area in Pakistan’s Baluchistan province were recently examined.
Dyed Green Marble Imitating Jadeite
What appeared to be high-quality jadeite was actually dyed green marble with calcite as the main mineral.
Coated Lawsonite Pseudomorphs Presented as Chromian Lawsonite
Samples composed of lawsonite pseudomorphs were coated to make them appear deep green and imitate chromian lawsonite crystals.
Natural Pearl Aggregates from Pteria Mollusks
Ten loose pearls with interesting shapes and internal growth features were from Pteria-species mollusks.
Unusual Short-Wave UV Reaction in Synthetic Blue Spinel
A blue synthetic spinel grown by the Verneuil process displayed the short-wave UV reaction of a flux-grown sample.
Natural Colorless Type IaB Diamond with Silicon-Vacancy Defect Center
Examination revealed a rare instance of a silicon-vacancy defect in natural diamond.
Letters: Analysis of Three-Phase Inclusions in Emerald
A response to the Summer 2014 G&G article on three-phase inclusions in emerald.
Online Diamond Sales 17% of U.S. Market
According to a recent De Beers study, online sales of diamond jewelry comprise about 17% of the market in the U.S.
Pearl Newsletter: Margaritologia
Margaritologia, a quarterly newsletter on pearls, was recently launched by Elisabeth Strack.
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