... around 15%;C.goethite around 18%;D.miscellaneous over 10%Sand rock,sound insulation,moisture absorption,no weathering outside,no dissolving ... in water moss and easy clean. yellow sand rock1Size 300×200cm,300×100cm,200×100cm,30×30cm,etc ... size of customer's request2Thickness≥2mm3Usagefor walls,carved board,artistic vase,sculpture&fountain,style fireplace,Roman pillar,door and window frame ...