Notwithstanding the lofty attitude of judicial impartiality which we endeavored to assume at the beginning of this article, a lurking suspicion remains in our mind that had the Braganza, like the round stone before described, been subjected to the keen scrutiny of Mawe's scientific eyes, it would no longer be classed among the most remarkable diamonds of Europe. Considerable difference of opinion exists as to the fate of the Braganza after King John's death. Did he give it to Don Miguel his second son? or was it a crown jewel and as such did it devolve upon Don Pedro the eldest along with the kingdom of Portugal? Don Pedro preferred the young empire of Brazil to the old kingdom of Portugal, which he gave to his little daughter Donna Maria da Gloria for whom he contracted that unnatural marriage with his own brother. The house of Braganza was divided against itself for many years during the first quarter of this century and very nearly came to destruction thereby. The diamond which goes by the family name did not meddle in these politics, but lived in modest retirement, wherein it differs remarkably from the other diamonds with which we have already become acquainted. Indeed the Braganza stone leads so secluded a life that its very form is not distinctly known, but is said to be octahedral, a type of crystallization frequently met with in diamonds and topazes. Its color is likewise subject to variation; some writers declare it to be white, and others again aver that it is deep yellow. As to its valuation--that is mere guess-work under the circumstances of ignorance in which we all flounder. Romé Delisle raises his estimate to the enormous figure of fifteen hundreds of millions of dollars, while Jeffries lowers his to the more modest sum of twenty-five millions. Even this latter amount is a good deal to be locked up in so small an article as a stone eleven ounces in weight. VII. THE BLACK PRINCE'S RUBY. To give a full account of this precious stone would almost involve the writing of the history of England from the reign of Edward III. down to the present time. We shall therefore limit ourselves to a few of the most striking scenes in which the Ruby figured. Though differing much in appearance--the one being red and the other blue--the ruby and the sapphire are, chemically speaking, the same, _viz._ pure alumina. The perfect ruby is very rare and more valuable, size for size, than the diamond. It is tested in a curious manner. If it exactly agrees in tint with the fresh blood of a pigeon dropped upon the same sheet of white paper on which it lies, it is pronounced perfect. A stone of such beauty and rarity was of course supposed to be endowed with miraculous powers and affinities by the ancients; as, for instance, "the Osculan," dedicated by the Lady Hildegarde to St. Adelbert of Egmund. Of this stone, says a sixteenth-century writer: