Defect-free diamond is an important physics playground and technological tool due to its
well-known list of superlative properties, such as its hardness, thermal conductivity …

Chemical vapor deposited (CVD) diamond as a burgeoning multifunctional material with
tailored quality and characteristics can be artificially synthesized and controlled for various …

This paper presents a computer-vision-based methodology for automatic image-based
classification of 2042 training images and 284 unseen (test) images divided into 68 …

Introduction of modern technologies and methods and quality analysis for the gemstone
industry are the main strategic initiatives of the Small and Medium Development Authority …

Photoluminescence (PL) spectroscopy is frequently mentioned in the gemological literature,
but its relevance to the wider trade audience is rarely discussed. Due to the possibility of an …

Featured Application Laser-induced breakdown spectroscopy is applied to a variety of
gemstones for classification and characterization purposes. Abstract Laser-induced …

Raman and photoluminescence (PL) mapping is a non-destructive method which allows
gemologists and scientists to evaluate the spatial distributions of defects within a gem; it can …

We demonstrate a gemstone screening device based on fluorescence spectroscopy. The
device can be used to rapidly separate colorless and near-colorless (D to J color grades) …

Heavy metal contamination in raw materials has spread widely in the United States. The
high increased number of recalls in consumer products and the lack of stricter regulations in …

Gem-quality alexandrite, hiddenite and kunzite, elbaite and topaz minerals were
characterized through a multi-methodological investigation based on EMPA-WDS, LA-ICP …