A translucent building block and method of manufacturing the same where the block has at least two oppositely oriented outer surfaces between which extend a plurality of translucent members that are mounted to a retainer which supports the translucent members spaced inwardly of opposite free ends thereof which extend outwardly from the retainer to points adjacent the at least two outer surfaces and wherein a plurality of openings are provided through the retainer to permit passage of cast material during introduction of the material about the translucent members within a mold during a manufacturing process.