Granite is generally more heat-resistant than tiles. This is due to the inherent properties of the materials. Granite is an igneous rock composed primarily of quartz and feldspar, which are both highly heat-resistant minerals. Tiles, on the other hand, are typically made from ceramic, porcelain, or stone materials, which may not be as heat-resistant as granite.

The heat resistance of granite is attributed to its high melting point, which is around 850 to 900 degrees Celsius (1562 to 1652 degrees Fahrenheit). This high melting point means that granite can withstand high temperatures without deforming or melting. In contrast, ceramic tiles have a lower melting point, typically around 1,200 to 1,300 degrees Celsius (2,192 to 2,372 degrees Fahrenheit), which makes them more susceptible to damage from heat.

Porcelain tiles, which are a type of ceramic tile, have a higher heat resistance than standard ceramic tiles due to their denser composition. However, their melting point is still lower than that of granite. Porcelain tiles can withstand temperatures up to about 1,200 degrees Celsius (2,192 degrees Fahrenheit), which is still less than the melting point of granite.

In practical terms, this means that granite countertops or floors can be placed directly over stovetops or ovens without the risk of damage from heat. Tiles, especially ceramic ones, may crack or discolor when exposed to high heat, such as from a hot pan or pot. While porcelain tiles are more durable and can withstand higher temperatures, they are still not as heat-resistant as granite.

Data from the U.S. Geological Survey (USGS) and material science studies support these claims. The USGS provides information on the mineral composition and properties of granite, which contributes to its heat resistance. Material science research has also confirmed the melting points of various ceramic materials, further illustrating the difference in heat resistance between granite and tiles.