The Purchase of a Gem Stone--or What to do Until the Appraiser Arrives

Author: Jahns, Richard H.

Published in: Engineering and Science, Volume 18, Number 5, 1955, pp. 14-21

Part of: Engineering and Science, Volume 18:5, February 1955

Item Category: Feature Articles

Persistent URL: https://resolver.caltech.edu/CaltechES:18.5.jahns

Abstract

What makes a gem valuable? How can you tell the real thing from a piece of glass? An expert answers some basic questions about gems.

Files

• jahns.pdf (application/pdf)