Characterises the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata molluscs.
Read MoreSummarises data collected on more than 15,000 natural blue/grey/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this colour range.
Read MoreExplores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.
Read MoreCompares PL spectroscopy data of 48 emerald samples from three countries to evaluate the usefulness of the technique in geographic origin determination.
Read MoreDescribes the occurrence of iridescence, and the role of differential etching, in quartz crystals from India’s Jalgaon District.
Read MoreA simple chart of optical defects in diamond, including those that produce colouration and fluorescence colours.
Read MoreExamines the internal structure, chemical composition and spectroscopic features of 22 pen pearls.
Read MoreGem-quality peridot is occasionally found as mantle xenoliths within basalts near Pozzomaggiore.
Read MoreWidely known as a rock-forming mineral, andalusite is not frequently encountered as a gem material.
Read MoreThe authors used Vis-NIR spectral measurements combined with LA-ICP-MS data to investigate the usefulness of absorption spectra.
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