Past conferences
Abstracts Library
Zoisite and its many color
The mineral zoisite is a calcium alumosilicate belonging to the class of silicates, more exactly sorosilicate minerals
Rubies from Greenland
Gemology is traditionally practiced in laboratories, focused on identifying and analyzing gemstones. Vincent Pardieu’s journey, however, took a different path
The Importance and Methodology of Undertaking a Literature Search for Gemmological Research and Article Publishing
Performing a literature search is a very important—but often neglected—part of doing gemmological research
Hurlbutite from Myanmar
A crystal of the very rare mineral hurlbutite originating from Myanmar (without further locality details) was studied and faceted afterwards in two gems, which we also studied
Challenges in the Detection of Ruby and Sapphire Treatment in the Thai Market
The detection of treatments in ruby and sapphire remains a critical aspect and has become an increasingly complex issue in the gem trade and laboratories alike
A Photo Survey of Inclusions in Fossiliferous Amber
For many, fossiliferous tree resin, primarily amber, gained wide visibility to the public in 1993 where it was prominently featured in the movie, Jurassic Park
Amber from the Thanbaya Gaing Coal Mine, Minbu Township, Magwe Region, Myanmar
Amber was recently discovered by local coal miners at the Thanbaya Gaing Coal mine located 6.5 km northwest of Padaung village, and about 5 km west of Thanbaya Gaing village
Gemological Characteristics of New Transparent Brown Sapphire
A newly observed variety of faceted transparent brown sapphire has recently entered the gem market, prompting gemological attention due to its highly unusual appearance
Gems in Greece: Geology, mineralogy and crystallizing environment
In the accretionary Hellenides Orogen, gems occur in various rock types of mainly four tectonometamorphic units, the Rhodope- and the Attico-Cycladic massifs, the Pelagonian zone,
Application of Fibre Optics Reflectance Spectroscopy (FORS) for the determination of mineral pigments in jasper
The identification of pigments is carried out routinely mostly by X-ray diffraction, FTIR and Raman spectroscopy as well as visible absorption
Identification of melee size synthetic coloured diamond for jewellery
Synthesis methods to produce large and high-quality dia- mond for jewellery have been improved over the years, and large, colourless faceted stones weighing more than 50 ct have be
Blue sapphire from Malacacheta of Minas Gerais, Brazil
Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex geological setting
An approach to understanding the factors in the emerald enhancement clarity grading system used at CDTECGemlab
Emerald is the green variety of beryl, with its distinctive color resulting from trace amounts of chromium, vanadium, and iron
Modern Cultivation of Freshwater Pearls in China: Advances in Materials, Technique
This presentation explores the modern advancements in freshwater pearl cultivation in China, focusing on the materi- als, techniques, and market orientation driving the industry
Automated Data Processing of Raman Spectra for Supporting Spinel Origin Determination
pinel is a highly valued gemstone, with its color and quality influenced by trace-element chemistry and crystal structure. Accurate determination of its geographic origin is crucia
Pink-orange gem quality euclase from Bahia, Brazil
Euclase, monoclinic crystal system—is a seldomly occurring mineral and with a Mohs hardness of 7 and a perfect cleavage to (010) rarely faceted for use in jewellery, but crystal
Novel cultured pearls with ceramic nucleus and possible cause of their strong luster
Cultured pearls with a ceramic nucleus (bead) represent a new type of saltwater cultured pearls that has recently emerged
Advancing Fei Cui Origin Authentication: A comparison of green fei cui from Myanmar, Guatemala, Italy and Russia
In recent years, an increasing number of sources of fei cui, such as Guatemala, Italy and Russia, have entered the Chinese market, leading to a growing demand for precise origin de
Noble gas in corundum: interests in gemology
Noble gases —elements of the last column of the periodic table—are chemically defined by their full outer electron shells, making them highly inert and very volatile under ambi
Geographic Origin Determination of Natural Yellow Sapphires: The Preliminary Study
Determining the geographic origin of yellow sapphires plays a critical role in the gem trade, as origin often dictates both perceived quality and market pricing
