FINE AMERICAN AMMONITE. ...

Description

FINE AMERICAN AMMONITE
Placenticeras meeki
Upper Cretaceous
Bearpaw Shale Formation, Montana, USA
This beautiful example of a rare species of ammonite found only in the northern United States and Canada has been prepared by removing the outer layer of the shell to expose the delicate fern-like growth structure within. Geomorphically replaced over millions of years by a variety of minerals, the example here boasts a main body of lovely golden calcite, highlighted by rippling suture lines of dark chocolate brown to create a most pleasing aesthetic contrast. Both sides of the shell have been highly polished to give it a lustrous finish, and on one side there is even some remnant of the original nacreous lining, flashing with dazzling gold, red and blue as one turns it against the light. A fine specimen, it measures 8½ inches across.

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