Polished Marillana Conglomerate slab MC121 oldest agate in the world Dimensions at widest points approximately

Dimensions at widest points approximately 160 mm x 150 mm x 16 mm thick

100 mm x 50 mm  x 21 mm

CC150  Chrome chalcedony rough rock

Dimensions at widest points approximately 180 mm x 120 mm x 60 mm thick

DOT109  Tumble polished Wanong Dendritic Opal

Polished Marillana Conglomerate slab MC121 oldest agate in the world Dimensions at widest points approximatelyMC121 Marillana Conglomerate slab, cut and polished on one side . Dimensions at widest points approx. 190 mm x 110 mm x 10 mm thick. Weight is 381 grams. . From Marillana station in the Pilbara region of Western Australia. Conglomerate is a sedimentary rock consisting of individual pebbles (clasts) within a finer grained matrix that have become cemented together. Conglomerates are a very common rock type that occur in numerous locations world wide.