Diamond is extremely durable due to strong covalent carbon bonds, but it can burn in the presence of oxygen at high temperatures.

The claim states that diamond is extremely durable due to strong covalent carbon bonds and that it can burn in the presence of oxygen at high temperatures. This is a standard, scientifically well-known fact about diamond's material properties. Retrieved papers [1], [5], and [9] discuss carbon bonds, nanodiamond oxidation, and high-temperature surface stability under oxygen, which directly align with parts of the claim. Because the physical properties of diamond and its combustion behavior in oxygen are matters of basic everyday scientific observation and established textbook knowledge, the verdict is COMMON_KNOWLEDGE.