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eggshells eggshell egg shells shell eggs semipermeable coquilles doeufs cascaras huevo cascas ovo gusci duovo membrane pores bloom cuticle outer covering calcium carbonate deficiency therapies powdered sockets bone mineralization growth lime plant fertilizer lactate firming agent flavor enhancer leavening nutrient supplement stabilizer thickener orange juice fertilizers soil conditioner paper pulp biofiller closeup view image picture stock photo broken made