Ammnonite imprint in matrix
$45.00
Item number:
7
An ammonite imprint in matrix (also known as a natural external mould or negative fossil) is the detailed rock impression left behind after an ancient ammonite shell dissolved over millions of years.Unlike fossils that feature the actual shell, these specimens preserve the precise spiral geometry, ribbed textures, and growth lines directly into the surrounding host stone, or "matrix". They offer an amazing, tactile look at how prehistoric sea life was packed into ocean sediment.