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What mineral leaves a green-black powder when rubbed against an unglazed porcelain plate?
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What mineral leaves a green-black powder when rubbed against an unglazed porcelain plate?

User Michael Gummelt
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Answer:pyrite

Explanation: The Streak Test: Marks, known as "streaks," are produced by scraping mineral specimens across unglazed porcelain plates. On the left, a specimen of pyrite has produced a black streak.

User Magiix
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it’s pyrite. it leaves green and black streaks :)
User Psergiocf
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