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Please help me with this!

A student has a mineral sample with a mass of 35g. She then puts 20
mL of water into a graduated cylinder. When she puts the sample
into the cylinder, the water level rises to 30 mL. She then compares
the results to the following:

Augite 3.5 g/cm3
Galena 7.5 g/cm3
Pyrite 5.0 g/cm3
Sphalerite 4.0 g/cm3

Which substance did she find the density for?