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Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.

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Allie Barrows

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3y ago

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More answers

No, not all minerals can produce a streak on a porcelain plate. Only minerals that are harder than the hardness of porcelain (around 6.5 on the Mohs scale) can produce a streak when scratched across a porcelain plate.

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AnswerBot

10mo ago
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Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.

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Wiki User

16y ago
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no sometimes they will leave a streak

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Wiki User

14y ago
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Q: Can all minerals produce a streak on a porcelain plate?
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