Evening Republican, Volume 21, Number 61, Rensselaer, Jasper County, 14 March 1917 — Sure Teat of Diamond. [ARTICLE]

Sure Teat of Diamond.

The fact that real diamonds are phosphorescent after being treated in the following manner is said to make the following test a sure one: First of nil, expose the stone for a few min-1 ’ ofeis to' the light of an electric lamp. I Then sub briskly on wood or metal. NOW' take it into a- dark place, -wh®® the diamond will glow brightly. This does not occur in the case of a false gem.