| http://www.w3.org/ns/prov#value | - A mold for ground-covering stones, said mold having projections and recesses nestable with companion recesses and projections on another mold, comprising:a mold (1) having a perimeter (2) in the general shape of a polygon selected from the group including rectangle and hexagon, said perimeter having a planar top surface (3), a parallel planar bottom surface (4), said perimeter (2) having corners (
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