Asked by big gieger

does copper have a streak

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Answered by GPT-5 mini AI
Yes. Native copper leaves a metallic, copper-red to reddish-brown streak on an unglazed porcelain streak plate. Note that because copper is soft and malleable it may smear rather than produce a long powdery streak, and surface tarnish can mask the fresh streak color. (Other copper minerals have different streaks — e.g., malachite pale green, azurite light blue, cuprite brick-red.)