Polished Marillana Conglomerate slab MC121 oldest agate in the world Mostly plain petrified wood but

Mostly plain petrified wood but one Teredo bore hole is visible

Natural rough back and sides

Dimensions at widest points approximately 115 mm x 75 mm x 40 mm thick

100 mm x 50 mm  x 21 mm

Polished Marillana Conglomerate slab MC121 oldest agate in the world Mostly plain petrified wood butMC121 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.