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luster, Enargite is notable for its grayish black color and streak. However, a tarnish will dull.....more
of three elements: copper, iron, and sulfur and usually a small amount of silver, gold, manganese.....more
SilverThe color and steak of native silver is grayish white and it remains stable in the air and water.....more
and selenium, and small amounts of gold and silver sometimes.It is of leaden color and low hardness.....more
