Iron oxide pigments are powders which can either be stirred into wet concrete before it’s poured into the molds, or applied as a wash after the stone is demolded (see Decorative Finishes in our Tutorials for a full description of wash techniques). Eight ounces of pigment will color approximately 4-6 stepping stones or 8-10 edging stones. Our Photo Gallery has examples of iron oxide staining and finishing. 
Please note: each oxide color has a different density. If you order two or more colors you may notice that one jar is fuller than the other. Rest assured that all jars contain 8 ounces of pigment.