[Skip to Content]
[Skip to Content Landing]
Article
May 3, 1902

The Roentgen Rays in Detecting False and True Gems.

JAMA. 1902;XXXVIII(18):1171-1172. doi:10.1001/jama.1902.02480180049014

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.

Abstract

Sterling, Ill., April 21, 1902.

To the Editor:  —About one year ago, in conjunction with a local jeweler, I exposed a number of gems, both real and imitation, to the x-rays. On developing the plate, we found that the image or shadow of the real gems was very dim and indistinct, while the shadow of the false gems was dark and very sharp, showing a well-marked difference in all instances; on carrying the experiments further we found that the shadows of all the stones we examined—and we examined all the more familiar ones—were invariably faint and indistinct, while the shadows of all the imitation ones were well marked and bold. We paid no particular attention to these experiments, as. while neither of us had ever seen any mention of this use of the Roentgen rays, we thought that surely some persons had made this discovery before. But now after a

First Page Preview View Large
First page PDF preview
First page PDF preview
×