from enchantments, and from phantasies and illusions of wicked spirits. And if any cursed witch or enchanter would bewitch him that bears the diamond, all that sorrow and mischance shall turn to the offender, through virtue of that stone; and also no wild beast dare assail the man who bears it on him. Also the diamond should be given freely, without coveting and without buying, and then it is of greater virtue; and it makes a man stronger and firmer against his enemies; and heals him that is lunatic, and those whom the fiend pursues or torments. And if venom or poison be brought in presence of the diamond, anon it begins to grow moist and sweat. There are also diamonds in India that are called violastres (for their colour is like violet, or more brown than violets), that are very hard and precious, but some men like them not so well as the others. Also there is another kind of diamonds that are as white as crystal; but they are a little more troubled; and they are good and of great virtue, and they are all square and pointed of their own nature; and some are six-square, some four-square, and some three, as nature shapes them; and, therefore, when great lords and knights go to seek honour in arms, they gladly bear the diamond upon them. I shall speak a little more of the diamonds, that they who know them not may not be deceived by chapmen who go through the country selling them; for whoever will buy the diamond, it is needful that he know them, because men counterfeit them often with crystal, which is yellow; and with sapphires of citron colour, which is yellow also; and with the sapphire loupe, and with many other stones. But these counterfeits are not so hard; and the points will break easily, and men may easily polish them. But some workmen, for malice, will not polish them, to that intent, to make men believe that they may not be polished. But men may assay them in this manner; first cut with them or write with them in sapphires, in crystal, or in other precious stones. Also take the adamant[367], that is, the shipman's stone, that draws the needle to it, and lay the diamond on it, and lay the needle before the adamant; and if the diamond be good and virtuous, the adamant draws not the needle, while the diamond is there present. This is the proof that they beyond the sea use. Nevertheless it happens often that the good diamond loses its virtue by sin, and for incontinence of him that bears it; and then it is needful to make it recover its virtue again, or else it is of little value. CHAPTER XV. OF THE CUSTOMS OF ISLES ABOUT INDIA.—OF THE DIFFERENCE BETWEEN IDOLS AND SIMULACRES.—OF THREE KINDS OF PEPPER GROWING UPON ONE TREE.—OF THE WELL THAT CHANGES ITS ODOUR EVERY HOUR OF THE DAY.