WArizona flagstone
WArmenian bole
WBast fibre
WBiogenic substance
WBoulder
WCertified wood
WClay
WCob (material)
WCobblestone
WCompressed earth block
WContained earth
WCrushed stone
WDecomposed granite
WList of decorative stones
WDorrite
WDry stone
WEarth structure
WExpanded clay aggregate
WGravel
WIkranite
WKnapping
WLight clay
WManilkara bidentata
WMetal clay
WMineral
WNatural fiber
WNatural rubber
WNevadaite
WPebble
WQuarry-faced stone
WRammed earth
WSchist
WSlate
WSoil
WSorbent
WStone wall
WStraw
WThatching
WWithy
WWood