The following is an abstract for the selected article. A PDF download of the full text of this article is available here. Members may download full texts at no charge. Non-members may be charged a small fee for certain articles.

Identification of Rubies by Energy-Dispersive X-ray Fluorescence Spectrometry

Volume 48, Number 5 (May 1994) Page 641-643

Yu, K.N.

Ruby, the red variety of the mineral corundum, is among the most valuable of gems. Ruby is allochromatic, with the color arising from the trace concentrations of chromium (Cr). Gemmologists face two problems in the identification of rubies. The first is the determination of whether a ruby is natural or synthetic; synthetic rubies are much less valuable but may not be distinguishable from natural rubies with the use of conventional tests (e.g., hardness, density, and refractive index). The second is the determination of the source of origin.