help with minerals in science please!?

Question

how can two minerals have the same chemical composition but different physical properties?

Answer 1

This is due to he arrangement of the atoms in space relative to one another.

As a simple example:

Diamond and graphite have the same chemical composition (carbon) however, the two substances differ because graphite is essentially sheets of hexagonaly bonded carbon atoms, while diamond contains carbon atoms bonded across all planes of space.

This different arrangement of the same chemical composition gives rise to different physical properties.

Answer 2

its called allotropy its based on the arragment of atoms in the lattice so y theres a difference in physical properties