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Biology, 03.01.2020 17:31 goargrant

Mineral x is scratched by a diamond. mineral x

1. has a mohs hardness of 10
2. can't be scratched by a penny
3. is softer than a diamond
4. must be a precious metal

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Mineral x is scratched by a diamond. mineral x

1. has a mohs hardness of 10
2. ca...
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