Birth Stones Wodiska: A Book of Precious Stones Page 389



	I Carat's Weight in Various Localities 303 semi-precious stones in the trade are reckoned in pennyweights. Pearls are weighed and their values calculated by the grain (1/4 carat). Diamonds are designated in the trade as " grainers," " two grain-ers," etc.; a " four grainer " is a diamond weighing one carat. The practice in the United States has been to calculate the carat at 205 milligrams or 3.210 grains Troy. The new metric carat, which will probably eventually become the universally recognised standard, will weigh 200 milligrams or 3.130 grains. CRYSTALLOGRAPHY SYSTEMS OF CRYSTALLINE FORM



	" BIRTH-STONES " A RHYMING LIST OF NATAL GEMS POPULARLY IDENTIFIED WITH THE MONTHS {Substantially as published by Wirt Tassin and other authorities) JANUARY By those in January born No gem save garnet should be worn;