An industrial abrasive, substance X\text{X}X, is evaluated for use in high-temperature cutting tools. Tests show that substance X\text{X}X has a melting point of 2730∘C2730^\circ\text{C}2730∘C, is completely insoluble in water, and does not conduct electricity in either its solid or molten state.
What type of substance is substance X\text{X}X?
Giant covalent
Ionic
Metallic
Simple molecular
