In cutting a diamond, the stone is firmly embedded in lead at the end of a stick. Only the portion which is intended to be cut is exposed at one time. The Kohinoor was properly fixed in its leaden surrounding, and placed in the hands of the duke. He held it firmly against a swiftly revolving wheel covered with diamond dust, and in a little while the first facet was finished. Then the stone was placed in the hands of the workmen who were to continue the operation; and when their labors were completed, the Kohinoor was found blazing brilliantly, and justified its title as the Mountain of Light. The largest and most valuable diamond in the world, so far as known, is presumed to be the one so long owned by the Sultan of Matan, Borneo. It weighs three hundred and sixty-nine carats, and is valued at five million dollars—a very good piece of property to have; but it is said to be so carefully kept, that no ordinary diamond thief can obtain it. [Sidenote: ARTIFICIAL DIAMONDS.] Though diamonds cannot be made artificially, they can be imitated, and the imitation is almost perfect. Several French manufacturers of bogus diamonds have obtained high reputation for their skill. Flint, white sand, and silver are the substances used; at least they are said to be the substances, though there is doubtless some other material added which the manufacturers do not mention. These fraudulent diamonds, in weight, color, and brilliancy, are almost identical with the genuine ones, and some of them have even deceived the dealers. They will stand some, but not all, the tests applied to diamonds. They reflect the light perfectly, but are apt to grow dim in a few weeks, and require fresh polishing. The diamonds sold in New York under the name of Alaska, Australia, or California diamonds are mostly of French manufacture, and were never seen in the locality whose name is applied to them. False diamonds have become so common among certain classes of Americans as to cause the real diamond to be used very rarely among other classes. During the prosperity of the famous Tammany Ring, false diamonds blazed on many a political shirt-front, where they could be seen and admired of men. The followers of the Ring politicians were generally equipped with false diamonds; but the great leaders, like Tweed and his companions, decorated, or were supposed to decorate, themselves with the genuine article. There are many strange stories told in connection with diamonds. We have already seen through what vicissitudes the famous diamonds have passed. A story is told of a French prince, who, while travelling, was attacked by robbers. He had intrusted a valuable diamond to a faithful servant. The servant was slain, but the master escaped. He returned subsequently to the scene of the fight, and sought for the diamond, but could nowhere find it. At last he bethought himself to examine the body of his attendant, when he found that the latter had swallowed the diamond to preserve it.