Fossil Brachiopod Value Guide

These fossilized brachiopods, often called lamp shells, represent a 350-420 million-year-old legacy from the Devonian and Carboniferous periods. Unlike common bivalves, these specimens feature distinct upper and lower shells preserved in a sturdy sedimentary rock matrix.

What affects the value of Fossil Brachiopod?

• The clarity and preservation of the shell's surface details and ribbing.
• The size and completeness of the specimen within its original rock matrix.
• The specific geological period of origin, such as the Devonian or Carboniferous eras.
• The overall aesthetic appeal and contrast between the fossil and the surrounding stone.

How to Identify Fossil Brachiopod?

• Look for the characteristic bilateral symmetry across the midline of the shell valves.
• Identify the distinct upper and lower shell structure, which differs from the left-right symmetry of modern clams.
• Check for a calcium carbonate composition embedded within a natural sedimentary rock matrix.
• Observe the pedicle opening or beak at the hinge, which gives them their lamp shell nickname.

History of Fossil Brachiopod

Brachiopods, also known as lamp shells, have been around for over 500 million years. They flourished during the Paleozoic era and were once one of the most abundant forms of life on the seafloor. Unlike modern bivalves which have left and right shells, brachiopods have upper and lower shells. This specimen captures a moment in time from an ancient seabed, likely from the Devonian or Carboniferous periods.