Multiple Choice
For the majority of minerals,the streak obtained when the mineral is scratched against a porcelain plate is
A) only useful if the mineral is softer than the porcelain streak plate.
B) always diagnostic of that mineral.
C) not useful,because the porcelain will often chemically react with the mineral.
D) always dark brown or black.
Correct Answer:
Verified
Correct Answer:
Verified
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