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: Sylvia M. Gumpesberger, "Magnetic Separation of Gemstones," Fall 2006, p. 124.
  Table: Magnetic Characteristics of Various Gem Materials Observed by the Direct Method
  Submitted by Sylvia M. Gumpesberger

• Source: Joe C.C. Yuan et al., "Investigation by Synchrotron X-ray Diffraction Topography of the Crystal Structure Defects in Colored Diamonds (Natural, Synthetic, and Treated)," Fall 2006, p. 93.
  Table: Degree of Defect Formation in Natural, Synthetic, and Treated Diamond Samples
  Submitted by Joe C.C. Yuan

• Source: "Lab Notes: Bone Pendant," Summer 2006, pp. 160–161.
  Additional Figures (6/16/06)
  Submitted by Paul Johnson