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共找到 4 筆符合的資料
and selenium, and small amounts of gold and silver sometimes.It is of leaden color and low hardness.....more
, but chalocoprite is more yellowish and lower in hardness. The black-green streak can be used.....more
is grayish black and it has the characteristics of being low hardness. The formulation of bornite.....more
specific gravity, and lower hardness. When exposed to the air and weathering, cinnabar decomposes.....more
