... square,rectangle,round,hexagon,triangle,rhombus,irregular are the form of shell4.based on mesh ,ceramic,magnesium oxide board,pvc ... ,acrylic,plywood.1.General Information:name of production:shell mosaicmaterial:mother of pearlchip size:20*20mm,25*25mm,30830mm, ... can be chosen OEM or OEDM accepted5.Workmanship of shell mosaic: collect raw material cut shell chips choose same thickness choose best ...