How to identify quartz stone quartz stone is good or bad four, the standard authentication quartz stone as identification standard quartz stone: 2, density: 2.37-2.5 3, temperature: can be temperature 300 ℃. It does not change color after using a stainless steel cup filled with boiling water 30 minutes into the table. Or with a lighted cigarette butt on the quartz stone quartz stone purposes, not color. Artificial quartz stone quartz stone procurement knowledge chap market conditions and trends since the development costs of this production line is very expensive, and quartz stone production technology is difficult to control so that the quartz production technology is still being a few vendors control. Kai Sa quartz | Kai Sa Building Materials | quartz by Sa Building Materials Co., Ltd., Dongguan City, Kai. Dongguan Kai Sa Building Materials Co. (www.kaisa-stone.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!