What characteristic of stones is retained even after exposure to heat?

The characteristic of stones that is retained even after exposure to heat is strength. When stones are subjected to high temperatures, their physical and chemical properties can change, but they generally maintain their structural integrity and ability to support loads.

Stone is primarily composed of minerals that have high melting points, which helps them withstand significant heat without losing their ability to bear weight. Fire resistance is one reason why stone is often used in construction, especially in areas that may be exposed to fire hazards.

Weight, color, and granularity can be affected by heat exposure. For instance, intense heat can cause certain stones to undergo thermal expansion or chemical changes, potentially altering their color or granularity, and they might even lose some water content, impacting their overall weight. Thus, strength is the most reliable characteristic in this context as it continues to be a key structural property, affirming its importance in building materials.