Introduction to the Composition and Characteristics of Doorstone

If today's mining, processing equipment, and technology were applied to granite, it would undoubtedly be more popular than marble.花岗石 often contains other minerals like amphibole and mica, resulting in a variety of colors including brown, green, red, and the common black. Due to its slow crystallization process, its crystals interlock like a Rubik's Cube, making it extremely durable. It is as enduring as a building, resistant to chipping, scratching, and high temperatures. Whether in color or luster, with some knowledge of maintenance, it will not fade or darken. It is almost impervious to pollution, and after polishing, its surface shines brightly, with almost no impurities from various weather conditions being able to adhere to it.
Doorstone is primarily composed of quartz (35%), feldspar (45%), and more feldspar, with a Mohs hardness of around 6.5. The color is usually dark, and some contain trace amounts of calcite. Its appearance reveals a crystalline structure with mineral grains. Depending on the proportion of quartz, mica, and feldspar, granite can be further classified into various types. The advantages of granite include its high hardness, resistance to acids and alkalis, wear resistance, and strong resistance to erosion. It is suitable for exterior walls, floors, corridors, stairs, kitchens, bathrooms, and other parts of buildings, and is easier to maintain than marble.