The New York lab recently examined several diamonds with an interesting variation on the cabochon.
Read MoreDescribes the occurrence of iridescence, and the role of differential etching, in quartz crystals from India’s Jalgaon District.
Read MoreA study of these pearls to characterize their distinctive flame structure and examine the possibility of rotation during their formation or growth.
Read MoreA dramatic color change is observed in a hackmanite sample with an apatite inclusion.
Read MoreA report on the striking color-change behavior of the first faceted synthetic wakefieldite seen at GIA.
Read MoreOne of the finest specimens of double pseudomorph ikaite-calcite-opal ever unearthed was on display at the Pueblo Gem & Mineral Show.
Read MoreExamination of quartz from a new source in Madagascar reveals complex fluid inclusions consisting of petroleum, methane, asphaltite, and water.
Read MoreStudy of phosphorescence produced from visible light suggests future difficulty in accurately assessing bodycolor of HPHT-grown diamonds.
Read MoreA 586.43 ct cat’s-eye aquamarine is donated to the Smithsonian National Museum of Natural History.
Read MorePresents a method for accurately predicting the color of a gem material when viewed in any direction as long as the polarized spectra and the viewing angle relative to the c-axis are known.
Read More