ReneBear
ReneBear
31-03-2017
Biology
contestada
Please can any one help me on this thank you all
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NymiNatalie
NymiNatalie
31-03-2017
The answer is gypsum as 2 is lower than 2.5 and since the other minerals are very hard, it would cause damage to the fingernail since the fingernail's hardness is 2.5.
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fitbit
fitbit
31-03-2017
Your correct it is gypsum
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