Step-by-step explanation: Genuine diamonds and imitation diamonds are different in terms of their strengths.
Strength is directly related to the density of the molecule.
High density means the molecule is hard as there will be no voids and the particles are closer to each other.
Lower density means that the molecule is soft because there will be voids present and the particles will be away from each other.
Genuine diamonds are hard in nature and hence they have high density while imitation diamonds can be broken down easily and hence they have has lower density.