The quartz stone of good quality and heavier weight is produced under the conditions of high temperature and high pressure by a press, with relatively uniform particles, high density and not easy to penetrate.
The bad quality quartz stone is produced by a heavy-duty press for casting and production. It has a high density, has pores, and is easy to penetrate, and there will be small particles on the front side and large particles on the back side.
The main component of quartz stone is made of quartz sand, which is silicon dioxide. In nature, the hardness is equivalent to diamond. A good quality quartz stone will only show minor scratches after being scratched with a key or a knife. Obviously, poor quality quartz stone contain inferior materials such as calcium powder. If scratched with a key, there will be white powder and obvious scratches, and the metal color of the knife will remain on the quartz stone surface.
High-quality quartz stone should contain more than 93% of natural quartz, and will not chemically react with acidic substances. Poor-quality quartz stone contains more calcium substances and will react with acid to produce bubbles.
Quartz stone has high temperature resistance properties. After burning it with a lighter for a while, it is generally high-quality quartz stone that can be scrubbed clean with water. On the contrary, it is bad quality quartz stone.
Soy sauce is the best test material. Pour it on the quartz stone surface, After a few hours of observation, The good quality quartz stone has a very high density, and colored objects are not easy to penetrate, wipe off without leaving traces. The bad quality quartz stone is easy to penetrate and difficult to recover.