Program for Session 04o

Monday 14th June PM: Room Ballroom C

04o (Oral): Geochemistry and trace elements in gem materials
Session chaired by Emmanuel Fritsch & Benjamin Rondeau

13:30  Separation of Natural and Synthetic Gemstones Using LA-ICP-MS: Amethyst, Citrine, and Malachite
Breeding C & Shen A
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13:45  Discrimination of Emerald Origins By Chemical Components
Le TTH, Nguyen TC, Hofmeister W & Häger T
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14:00  Chemical Variations in Multicoloured “Paraíba”-Type Tourmalines from Brazil and Mozambique: Implications for Authentication and Provenance Determination
Peretti A, Bieri W, Reusser E, Fontaine G, Hametner K & Günther D
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14:15  Looking for the Keys Under the Lamppost: Trace Elements in Fibrous Diamonds
Weiss Y, Navon O & Griffin WL
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14:30  Quantifying Boron in Natural Type IIb Blue Diamonds
Gaillou E, Rost D, Post J & Butler J
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14:45  The Origin of Coloration in Garnets: An Optical Spectroscopic Study
Galoisy L, Feneyrol J, Juhin A, Kiratisin A, Giuliani G & Calas G
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15:00  A Microstructural Study of Pietersite Gemstones from Namibia and China
Hu K & Heaney P
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15:15  Luminescence of Opals: A Witness to their Geochemistry
Fritsch E, Gaillou E, Massuyeau F & Rondeau B
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15:30  New Opals from Wollo, Ethiopia: Geochemical Characterization
Rondeau B, Fritsch E, Cenki-Tok B & Mazzero F
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Monday 14th June PM: Room Ex

04o (Poster): Geochemistry and trace elements in gem materials

49  Chemical Composition of Apatite Inclusions in Corundum and Spinel Determined by LA-ICP-MS and its Potential for Authentication and Provenance Determinations
Bieri W, Grobéty B, Peretti A, Hametner K & Günther D
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50  Silicon in Sapphires – Its Role and Detectability by LA-ICP-QMS
Shen A
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51  Provenance of Gem Corundum: A Global LIBS Study
Yetter K & McMillan N
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