Asteroceras obtusum 70mm diameter. 175 x 140mm rock. Part prepared and so would be fine for somebody prepping with an engraver, although care would have to be taken. Repair on back of nodule (glued rock back on but without gaps or filler). Could be prepped from both sides for an artistic display piece. Really nice colour with gradual change from caramel to darker brown.

Moderate difficulty.