Characterises the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata molluscs.
Read More
Summarises 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 More
Explores 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 More
Describes the occurrence of iridescence, and the role of differential etching, in quartz crystals from India’s Jalgaon District.
Read More
A simple chart of optical defects in diamond, including those that produce colouration and fluorescence colours.
Read More
Examines the internal structure, chemical composition and spectroscopic features of 22 pen pearls.
Read More
Gem-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 More
The authors used Vis-NIR spectral measurements combined with LA-ICP-MS data to investigate the usefulness of absorption spectra.
Read More
