Vintage stone ashtray with orthocera fossils

Vintage black stone ashtray with inlay of orthocera fossils. Consisting of a polished plate, with a hollow in its center, triangular in shape. One of the corners has a natural breakage with polished edges as well. The stone plate includes orthocera, or fossils of white mollusks, as well as reddish "spots" probably derived from iron extracts... Good general condition, original breaks. Length 18 cm, width 12 cm, thickness 1.8 cm.

Ref. : Q5UPT2E5