Ammonites on Matrix (Quenstedtoceras sp., Jur…

Ammonites on Matrix (Quenstedtoceras sp., Jurassic) – Volga River, Ulyanovsk, Russia

This extremely artistic assemblage of large and small ammonites
from Russia demonstrate an intense iridescence and highlights due
to the presence of metallic Pyrite. The cluster has been positioned
on a new matrix, as the grainy rock in which these
Quenstedtoceras cephalopods were collected is not hard nor
stable enough to display them permanently. The added component is
an attractive piece of what is known as septarian, a mud-like
material that grows in nodules. In this instance, yellowish Calcite
crystals and gray sediment have formed the rock on which these
colorful ammonites reside. The cluster is quite representative of
the Volga River material, and that combination results in a
dramatic display specimen.

Overall Measurements: 6.30 x 5.51 x 5.71 inches (16.00 x 14.00 x
14.50 cm)