A molding apparatus for producing a biological tissue embedded in a block of an embedding material, said molding apparatus, comprising: a mold comprising a compartment configured for containing said embedding material, said compartment having a compartment floor and at least one wall extending upwards from said compartment floor, and said compartment comprises at least one depression extending downwards from said compartment floor, and wherein said depression comprises a depression floor, and wherein said depression is configured for accepting said biological tissue at least partially therein, and a press, said molding apparatus being configured to press a biological tissue at least partially into said depression, said press comprising a handle for gripping said press, and a foot comprising a non-planar foot surface, said foot being configured to enter at least partially into said compartment; characterized in that at least one of said depression floor and compartment floor is curved at least along one direction, thereby being centrally inclined; and in that said molding apparatus further comprises a sample sheet configured to attach to said biological tissue and hold said biological tissue thereon, said sample sheet being further dimensioned to be positioned in said compartment and to be constrained to said position thereof, at least along one direction, by said compartment; wherein said compartment of said mold comprises a sample recess extending downwards from said depression floor and having a sample recess floor, and said foot comprises a foot protrusion configured to enter at least partially into said sample recess when said press enters said compartment; and wherein said biological tissue is a core biopsy sample wherein a gap between said foot protrusion and said sample recess floor when said press is fully entered into said compartment corresponds to a width of said core biopsy sample. a mold comprising a compartment configured for containing said embedding material, said compartment having a compartment floor and at least one wall extending upwards from said compartment floor, and said compartment comprises at least one depression extending downwards from said compartment floor, and wherein said depression comprises a depression floor, and wherein said depression is configured for accepting said biological tissue at least partially therein, and a press, said molding apparatus being configured to press a biological tissue at least partially into said depression, said press comprising a handle for gripping said press, and a foot comprising a non-planar foot surface, said foot being configured to enter at least partially into said compartment; characterized in that at least one of said depression floor and compartment floor is curved at least along one direction, thereby being centrally inclined; and in that said molding apparatus further comprises a sample sheet configured to attach to said biological tissue and hold said biological tissue thereon, said sample sheet being further dimensioned to be positioned in said compartment and to be constrained to said position thereof, at least along one direction, by said compartment; wherein said compartment of said mold comprises a sample recess extending downwards from said depression floor and having a sample recess floor, and said foot comprises a foot protrusion configured to enter at least partially into said sample recess when said press enters said compartment; and wherein said biological tissue is a core biopsy sample wherein a gap between said foot protrusion and said sample recess floor when said press is fully entered into said compartment corresponds to a width of said core biopsy sample.