Description: "Mortar (see depressions, either side), perhaps used for hammering (see abrasions). One surface is straight, the opposite convex. Lava." "2 7/8" diam x 1 1/4" thick" (fide Barbara (Kanani) Burns, September 23, 1987). Remarks: "See Te Rangi Hiroa (Peter Buck) Arts & Crafts of Hawaii, 1957 Bishop Museum Press.