Show Tests of Diamonds Most persons are obliged in the purchase of a diamond to rely implicitly implicitly im im- upon the word of the man who sells the tho stone While many years of observation and experience are needed o 0 become an expert with respect o 0 the value and purity of ot diamonds vet et there are certain extremely simple simple simple sim sim- tests capable of being made by the most Inexperienced One Is by means of or a needle hole pricked through a piece of ordinary cardboard Looking through the stone tested at the cardboard one will see two holes boles If the diamond be spurious only only one If the gem be genuine ne The reason for this is that an Imitation diamond will give a double refraction the real stone but one refraction It is claimed that there is no acid I having any perceptible effect upon a genuine diamond Hydrofluoric acid will If dropped upon a stone made of ot glass corrode it but upon the bona bonafide bonafide fide stone it will have no effect at all I Harpers Harper's Weekly I |