Contributions to Gemology

During the last 15 years we have published numerous of our in-house publications ‘Contributions to Gemology’. The topics of our books are related to actual news, challenges or discoveries in the world of gemology at the time of publication.

All issues are available as hard copies in our shop. Alternatively we provide a digital version of each issue for you to read and download below.

No. 1, May 2002

  • The Color Enhancement of Fancy Sapphires
  • Color Zoning by Internal Migration
  • Formation of Color Centres

No. 2, August 2003

  • Report on Ruby and Spinel Mining in Namya
  • Rare Gemstone Painite
  • Beryllium Treatment Part B

No. 3, August 2004

  • Challenge of The Identification of a New Gemstone
  • New Gem Mineral Pezzottaite
  • Atomic Arrangements

No. 4, December 2005

  • Beryllium Treatment Extended

No. 5, November 2007

  • Gem Quality Johachidolite: Occurrence, Chemical Composition and Crystal Structure

No. 7, December 2008

  • Winza (Tanzania) Rubies Identified

No. 9, May 2009

  • Chemical Variations in Multicolored “Paraiba”-Type Tourmalines from Brazil and Mozambique: Implications for Origin and Authenticity Determination

No. 10, May 2011

  • Distinguishing Natural Tibetan Copper-Bearing Andesine from its Diffusion Treat Red Counterparts Using Advanced Analytical Methods

No. 13, May 2013

  • Record-Breaking Rubies Discovered in Didy, Madagascar

No. 14, March 2014

  • Identification of a New Generation of Synthetic CVD-grown Blue, Pink and Yellow Diamonds
  • GRS Investigates the Source of Ruby, Sapphire and Padparadscha from the Didy Mine in Madagascar