GREYISH-YELLOW NATIVE GOLD. 17 Third Subspecies. Greyish-yellow Native Gold. Graugelbes gediegen Gold, Werner. Id. Emm. b. ii. s. 114.—L’Or natif d’un jaune grisatre, Brock. t. ii. p. 92.—Fahlgelbes gediegen Gold, Eeuss, b. iii. s. 2(j0. Graugelbes gediegen Gold, Leonhard, Tabel. s. 51. Id. Karslen, Tabel. s. 60. External Characters. Its colour is brass-yellow, which verges on steel-grey. It occurs in very small flattish grains, like those of platina. Its surface is glistening. It is never crystallised. It is heavier than brass-yellow native gold, but lighter than gold-yellow native gold. In other characters it does not differ from the pre ceding. Geognostic and Geographic Situations. It occurs, along with platina, in South America. Uses. The numerous and important uses of this metal, will be considered in another work. We may here only re mark, that for whatever purpose gold is used, it is mixed with a quantity of copper, which is usually about j*, and never exceeds which gives the gold a consistence and a hardness it does not possess when pure. Vor.. ITI. B Observations.