Past conferences
Abstracts Library
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
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
Dyed purple Jade (Lavender jade or purple “Fei Cui”) from Mandalay’s jade market, Myanmar
Jade or "Fei Cui" are trade names for a stone that typi- cally contains only one or more main mineral components, including jadeite, omphacite, and kosmochlor
History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy
Bohemian garnets, i.e., chromium-bearing pyropes, are found in several jewellery pieces from the Migration Period (circa 400 to 600 A.D.), and only a small number of jew- els conta
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
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
A convincing glass imitation of larimar (pectolite)
Larimar, a massive blue variety of the mineral pectolite, belonging to the wollastonite group of minerals is known in the trade for few decades now
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
Effects of Gamma Irradiation on Corundum: Towards a Potential Detection Method
Corundum, encompassing the highly prized ruby and sapphire varieties, stands as a cornerstone of the global gemstone market
Color Genesis Analysis and Characteristics for Origin Identification of Purple Jadeite
Purple jadeite, renowned for its distinctive purple hues and rich cultural connotations, is highly admired and sought after
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
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
Gem zircon and sapphire age dating and application of origin determination: A study from New England sapphire fields, New South Wales, Australia
Ahmadjan Abduryim, Frederick Lin Sutherland, Terry Coldham, Elena Belousova Download Pdf
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
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
Hessonite garnet from Angul district of Odisha, India
This study describes hessonite (Fe-bearing variety of grossular garnet), found in the Birlamunda village, located in Palalahada tehsil of Angul district of Odisha state
Found, Lost, and Found Again: The Geological and Gemological Significance of the Salininha Emerald Deposit, Brazil
The Salininha emerald deposit located in the municipality of Pilão Arcado, Bahia State, represents the first economically significant discovery of gem-quality emer- alds in Brazil
Typomorphic features of tourmalines of the Malkhan pegmatite field from the Irkutyanka vein
A.Y. Shelementyeva, Y.B. Shelementyev, O.V. Yarapova Download Pdf
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
Colored gemstones of metamorphic origin: Progress report in understanding how they crystallize at depth in East Africa, the Hindu Kush, Pamir Mountains, and the Middle-Urals Ring Structure
It is difficult to reconcile the existence of deposits of trans- parent gems of metamorphic origin with the observation attributed to Robert Boyle (1627–1691) that the best crys-
