Past conferences
Abstracts Library
Pink to Red and Violet Diamonds from the Argyle Mine, Australia: Properties, Color Origin and Latest Research Results
The Argyle Mine was by very far the largest producer of pink to red diamonds worldwide and the only producer of violet diamonds
Gems in Hellenistic and Roman Jewellery of Northern Greece: An investigation from the Collections of the Archaeological Museum of Thessaloniki, Greece
This study presents the results of an interdisciplinary archaeogemological investigation focusing on gems embedded in Hellenistic and Roman jewellery from the collections of the Ar
Amber and its treatments: A New Baltic Amber Classification Chart
This paper aims to present the history of the modification of Baltic amber (succinite), and particularly the modern meth- ods of its enhancement, along with a discussion of their o
Padparadscha Sapphire & heat treatment
In 2018 the Padparadscha engagement ring of Princess Eugenie (Figure 1), the niece of the king, gave a boost to the popularity of the gemstone in the UK
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
Spinel from Sri Lanka – An update
Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varieties also been recorded in few locations
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
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
Cross-Cultural Provenance and Characterization of Turquoise Artefacts: A Multi-Analytical Non-Destructive Study of Reshui Tomb Cluster, China (744 AD) and Tepeh Zagheh, Iran (5200–4200 BCE)
Turquoise has long held considerable cultural, economic, and symbolic significance across ancient civilizations, func- tioning both as a prestigious ornament and as a medium of exc
Gem-quality pink fluorite from Planggenstock, Switzerland: chemical and physical properties and a comparison with pink fluorites from other localities
In this study, first results of trace element analyses and various spectrometric investigations on pink fluorites from alpine deposits (Aar and Montblanc Massifs) as well as from t
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
Morphologies and Surface Features of Diamond Samples from Southern Thailand
In 1955, the first report on Thai diamond was made by Dr. Payome Aranyakanon, a renowned tin exploration geologist of Thailand Department of Mineral Resources
Fe-Ti charge transfers: A comprehensive review and its applications to minerals and gems
The iron-titanium charge transfer (Fe-Ti CT) is mentioned in numerous articles as the source of the coloration of many nat- ural minerals and some man-made materials, but no global
HFSE-enriched sapphires of gem quality: A combined FTIR and trace element study and implications for heat treatment detection
Gem-quality sapphires containing ‘exotic’ elements such as Sn, Nb, Zr, Ta, W, are of special interest in gemmological research, as the concentration of these so-called high-fie
Shining light on “480 nm band” diamonds: Gemmological characteristics of an unusual group of diamonds with yellow and red luminescence
Fancy colour diamonds that derive their colour from nitro- gen-related defects (such as N3/N2 centers or C-centers) are relatively common and well-studied
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
Historic Emeralds and their Geographic Origin: A Retrospective Study
When it comes to the geographic origin of gems, curiously enough, historians sometimes put forward provenance without any documentary or scientific proof
Typomorphic features of tourmalines of the Malkhan pegmatite field from the Irkutyanka vein
A.Y. Shelementyeva, Y.B. Shelementyev, O.V. Yarapova Download Pdf
On the nature of blue rose quartz
Over the past several years, the market for pink-coloured rose quartz has been augmented by variants ranging from colourless through deep rose-pink, to lavender and blue
Studying renowned fancy color diamonds in museum collections: the case of the Winston Red
Museums are unique repositories of international treasures. They are also places of active research, even on the most valu- able objects, such as famous and / or historic gemstones
