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An ordovician Estonioceras

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Only the side of the nautiloid was visible before preparation

Only the side of the nautiloid was visible
before preparation

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The matrix was carefully chipped off in order to reveal
the centre of the fossil

The matrix was carefully chipped off
in order to reveal the centre
of the fossil

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The nautiloid is going to be prepared from both sides

The nautiloid is going to be prepared
from both sides

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The final result of the preparation work

The final result of the
preparation work

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The other side of the specimen

The other side of the specimen

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The translucent chambers preserved in calcite

The translucent chambers
preserved in calcite

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For this rare Estonioceras, all pieces located in the counterpart were transferred and smaller imperfections were reconstructed. The preperation work was done from both sides, to fully expose the calzistic chambers. 

Fossil: Estonioceras 

Locality: Erratic from Mecklenburg (Germany)

Formation: Ordovician

Diameter of the fossil: 7 cm

Collection: Stefan Polkowsky

Work required: 8 hours