In the tranquil atmosphere of the cemetery, tombstones that have weathered decades or even centuries of wind and rain still vividly engrave the names and lives of the deceased, telling stories that transcend time and space. These tombstones that can resist the erosion of time conceal the mystery of stone's resistance to weathering. Especially the tombstone material represented by granite, with its excellent weathering resistance, has become a "guardian of memory".
Among numerous tombstone stones, granite stands out as the preferred material for making tombstones. Its excellent weathering resistance is attributed to its unique geological structure and mineral composition. Granite is a type of deep-seated acidic igneous rock, mainly composed of minerals such as quartz, feldspar, and mica. Quartz has extremely high hardness and stable chemical properties, which can effectively resist external physical friction and chemical erosion; Feldspar accounts for a large proportion in granite, with a tight crystal structure that endows the stone with good integrity and strength; Although mica has a relatively low content, it can fill the gaps between mineral particles and further enhance the density of stone.
From a microscopic perspective, the mineral particles of granite interlock with each other, forming a structure similar to "reinforced concrete", greatly reducing the permeability of water and air. At the same time, the trace elements contained in granite, such as iron, magnesium, etc., form a very thin oxide film on the surface, like a natural "protective shield", preventing the invasion of harmful substances from the outside, thereby significantly improving the ability to resist weathering. According to scientific research, high-quality granite tombstones can maintain their appearance for hundreds of years without significant weathering under normal conditions.
