... surroundings by using GUINNESS quartz stone.·More than 50 colors for your choice·Thickness: 10mm, 12mm, 15mm, 18mm, 20mm, 25mm ... , 30mm·Standard size for big slabs: 3250 x 1650mm, 3005X1550mmSpecifications:crey crystal china quartz ... of deformation,cracking and breaking.·High temperature resistance The melting point for quartz material is up to 1300 degree, so quartz ...