. . of yellow. The pure mineral is colorless, and it is veryscarce; most specimens are brown, owing to the presence offerric or manganic oxide. The faces of the crystals exhibitdiamond luster. There is also another form, known aswood tin, occurring in roundish masses with a fibrousradiating fracture. Zinc. — A metal of a brilliant white color, with a shadeof blue, and appearing as if composed of plates adheringtogether. It is not brittle, but less malleable than copper,lead, or tin; when heated, however, it is malleable, and maybe ro
. . of yellow. The pure mineral is colorless, and it is veryscarce; most specimens are brown, owing to the presence offerric or manganic oxide. The faces of the crystals exhibitdiamond luster. There is also another form, known aswood tin, occurring in roundish masses with a fibrousradiating fracture. Zinc. — A metal of a brilliant white color, with a shadeof blue, and appearing as if composed of plates adheringtogether. It is not brittle, but less malleable than copper,lead, or tin; when heated, however, it is malleable, and maybe rolled into plates. Lead. — A metal of a dull white color, with a cast ofblue. It is soft and easily fusible. It is found native insmall masses, but generally mineralized by sulphur andsometimes by other substances. It is the least elastic andsonorous of all the metals. MINERALS CONTAINING CARBON Among minerals of economic importance, carbon min-erals hold the unique position of being at the same time ofthe most common and the most rare occurrence. As far as.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnaturalhistory, booky
