... quartz stone quartz crystal and polymer materials in a vacuum powered by high pressure synthesis, which contains up to 93% naturalquartz, ... and vacuum pressure to form very tight complexes, and then by a professional cut and dried, and surface polishing, Calibratin. ... customers' order is comfirmedFor more information,welcome to contact us at any time.contact information:Ms Jacy,tel: 86-592-2628507 Fax ...