G&G Data Depository

This depository contains material that is supplementary to articles published in Gems & Gemology. Detailed descriptions of methods, extensive tabular material, and additional data or images may be submitted by authors and/or recommended by the editors for inclusion in the depository.

Important Note: Depository material has not undergone the full G&G review/revision process. Questions on depository items should be directed to the person who submitted the item.

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• Source: Brendan M. Laurs et al., "Pezzottaite from Ambatovita, Madagascar: A New Gem Mineral," Winter 2003, pp. 268–283.
  Table 1: Electron-Microprobe Analyses of Pezzottaite Done at the University of New Orleans (1/20/04)
  Table 2: Mn, Fe, and Ti Abundances in Pezzottaite and Red and Pink Beryls (1/20/04)
  Spectra: IR Absorption, Raman, and X-ray Diffraction (1/20/04)
  Submitted by: Brendan M. Laurs

• Source: Thomas M. Moses and James E. Shigley, "G. Robert Crowningshield: A Legendary Gemologist," Fall 2003, pp. 184–199.
  Presentations at AGS Conclaves by G. Robert Crowningshield (10/30/03)
  Submitted by: Thomas M. Moses and James E. Shigley

• Source: John L. Emmett et al., “Beryllium Diffusion of Ruby and Sapphire,” Summer 2003, pp. 84–135.
  Table 1: Samples Used for Gemological Characterization (07/30/03)
  Table 2: Trace-Element Compositions of Be-Diffused and Natural-Color Corundum Determined Using SIMS (ppma) (07/30/03)
  Table 3: Durability and Stability of the Treatment in Be Lattice Diffusion–Treated Orange to Pinkish Orange Sapphires (07/30/03)
  Tables 1 and 2 submitted by: Wuyi Wang
  Table 3 submitted by: Robert E. Kane
  Supplementary Bibliography on Corundum Diffusion (07/30/03)
  Prepared by Gems & Gemology staff