TESTING A DIAMOND.

Press, Volume LIX, Issue 17701, 1 March 1923, Page 11

TESTING A DIAMOND.

There are few quite simple tests by means of which toe real diamond may be detected from the false stone. Immerse .the suspected jewel in a glass of water and see how it Appears, in the case of a real diamond _ the cut edges will stand out wiUi great clearness; with a spurious article the stone will so blend with tlie water that it oan hardly be distinguished, if possible, . look through the d amond at a single black spot on a sheet of white paper (says "liveiyday Science"): if the stone is genuine tnere will appear to be one sharp, clear spot. A lalse stone will give a m.sty view and quite often there may seem to be a number of spots. A tiny drop of water placed on a real diamond will keep its globular shape, and can be moved about with a pin. With a spurious stone, directly the drop is touched the watei; spreads all over the surface. Generally speaking, the cut edges on a real diamond are not so regular as in the case of fcn imitation; diamonds are so valuable that the cutter takes away as little as possible. If a specimen of a real diamond is at hand, test this and the suspected article with the tip of tne tongue. The real diamond feels much colder than the false.