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QuestionArt
Using graphite in a pencil, what color is produced during a streak test?
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Step 1I'll solve this problem step by step:
Step 2: Understand the Streak Test
The streak test is a method used in mineralogy to determine the color of a mineral when it is ground into a powder by rubbing it across a white porcelain plate.
Final Answer
Key Insight: The streak test is different from the mineral's surface color. While graphite can appear silvery-gray, its streak is consistently dark gray to black, which is a characteristic diagnostic feature used by geologists and mineralogists to identify the mineral.
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