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Avaaz
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09 Nov 2009
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Polymer-filled Aquamarine
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01 Nov 2009
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GemeFancy
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06 Sep 2009
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D-Screen
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24 Jul 2009
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Gemstones With Change Of Color
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10 May 2009
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Specialty Glasses
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23 Apr 2009
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Lapis Lazuli
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16 Mar 2009
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Chrysoberyl Cat’s eye
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03 Mar 2009
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Tiger-eye
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26 Feb 2009
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Jade
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04 Feb 2009
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The World of Colored Gemstones
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17 Jan 2009
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How to examine gemstones with the loupe and tweezer
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05 Jan 2009
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How to buy colored stones
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26 Dec 2008
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Black diamonds
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08 Dec 2008
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Color patterns in opal
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01 Dec 2008
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Colorless Coatings And Impregnations
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24 Nov 2008
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Composite and assembled opal
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20 Nov 2008
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Treated And Synthetic Gemstones
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11 Aug 2008
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How to judge Coloured Diamonds
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02 Jul 2008
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AIGS Course Fee 2009 Announcement
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01 Jul 2008
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Colored Akoya Pearls
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15 May 2008
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Étude Des Defauts Dans Les Diamants Bruns Et Les Diamants Riches En Hydrogene
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03 Mar 2008
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Les Corindons a Changement De Couleur
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03 Mar 2008
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Hydrogen-Related Optical Centers in Natural Diamond: An Update
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03 Mar 2008
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AIGS Bangkok Inspects Exceptional Clinohumite from Tajikistan
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03 Mar 2008
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Thermochromic and photochromic behaviour of “chameleon” diamonds
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03 Mar 2008
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The ‘‘amber centres’’ and their relation to the brown colour in diamond
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03 Mar 2008
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Natural, untreated diamonds showing the A, B and C infrared absorptions (“ABC diamonds”), and the H2 absorption
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03 Mar 2008
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Color-change Bastnasite-(Ce) from Pakistan
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03 Mar 2008
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The ‘‘amber centres’’ and their relation to the brown colour in diamond
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28 Feb 2008
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Natural, untreated diamonds showing the A, B and C infrared absorptions (“ABC diamonds”), and the H2 absorption
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28 Feb 2008
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Thermochromic and photochromic behaviour of “chameleon” diamonds
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27 Feb 2008
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Presentation about the AIGS, GGL, ICA fieldtrip reports
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19 Feb 2008
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Cyber Gems/ E-Commerce
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18 Feb 2008
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Pakistan: The Central Asian capital of the gemstone trade.
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18 Feb 2008
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Afghanistan: Land of beautiful gems and unique people.
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17 Feb 2008
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Tajikistan 2006: Gems from the Pamirs.
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16 Feb 2008
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Commentary: Treatments in Rubies and Sapphires
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15 Feb 2008
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Rubies from Tajikistan.
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15 Feb 2008
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China (Xin Jiang) 2006: Emeralds from the silk road
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15 Feb 2008
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A small calibrated parcel inclusion study, part b
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14 Feb 2008
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A small calibrated parcel inclusion study, part a
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14 Feb 2008
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A single 7 carat stone study
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14 Feb 2008
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Blue sapphire: Beryllium?
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14 Feb 2008
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Painite Update
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13 Feb 2008
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Ruby & Sapphire Update
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12 Feb 2008
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Introduction: Field trips to Thailand, Cambodia, Laos, Burma
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11 Feb 2008
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Report about Vietnam (April - May 2005)
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10 Feb 2008
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Report about Sri Lanka (May 2005)
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09 Feb 2008
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Report about Madagascar (June- July 2005)
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08 Feb 2008
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Report about Kenya (July 2005)
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07 Feb 2008
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Report about Tanzania (August 2005)
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06 Feb 2008
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Photo service at AIGS Lab
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05 Feb 2008
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Poudretteite: A rare Mogok Gem
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04 Feb 2008
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Update about Lead glass filled/repaired rubies
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04 Feb 2008
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French Gemological Association visit AIGS and Asia
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04 Feb 2008
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AIGS lab visit Pailin
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03 Feb 2008
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AIGS lab visit Houai Xai
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03 Feb 2008
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AIGS lab visit Kanchanaburi
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03 Feb 2008
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Exceptional alexandrite in Lab
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03 Feb 2008
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