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fusima
fusima
fusima

Ammonite – a natural fossil with a spiral shell

Number of products : 61

What is an ammonite?

Ammonites are extinct marine cephalopods belonging to the subclass Ammonoidea, which lived from the Devonian to the end of the Cretaceous period, approximately 400–66 million years ago. Their iconic spiral shells make them one of the most recognizable fossils worldwide.

Ammonite shells were originally composed mainly of aragonite (CaCO3), which often recrystallized into calcite during diagenetic processes. Internal chambers separated by septa served to regulate buoyancy, reflecting the biological complexity of these organisms.

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Amazonite heart with hole 6x6 mm 6 pcs.
Price: 7.00
Amazonite heart with hole 6x6 mm 6 pcs.
Ammonite cabochon 25x21 mm no 47
Price: 39.00
Ammonite cabochon 25x21 mm no 47
Ammonite cabochon 26x27 mm no 60
Price: 75.00
Ammonite cabochon 26x27 mm no 60
Ammonite cabochon 27x21 mm no 45
Price: 44.00
Ammonite cabochon 27x21 mm no 45
Ammonite cabochon 28x21 mm no 62
Price: 47.00
Ammonite cabochon 28x21 mm no 62
Ammonite cabochon 28x22 mm no 58
Price: 46.00
Ammonite cabochon 28x22 mm no 58
Ammonite cabochon 28x23 mm no 2
Price: 69.00
Ammonite cabochon 28x23 mm no 2
Ammonite cabochon 28x23 mm no 69
Price: 48.00
Ammonite cabochon 28x23 mm no 69
Ammonite cabochon 28x24 mm no 29
Price: 58.00
Ammonite cabochon 28x24 mm no 29
Ammonite cabochon 29x21 mm no 67
Price: 57.00
Ammonite cabochon 29x21 mm no 67
Ammonite cabochon 29x22 mm no 26
Price: 49.00
Ammonite cabochon 29x22 mm no 26
Ammonite cabochon 29x22 mm no 34
Price: 58.00
Ammonite cabochon 29x22 mm no 34
Ammonite cabochon 29x22 mm no 66
Price: 59.00
Ammonite cabochon 29x22 mm no 66
Ammonite cabochon 29x22 mm no 72
Price: 54.00
Ammonite cabochon 29x22 mm no 72
Ammonite cabochon 29x23 mm no 46
Price: 54.00
Ammonite cabochon 29x23 mm no 46
Ammonite cabochon 29x23 mm no 8
Price: 54.00
Ammonite cabochon 29x23 mm no 8
Ammonite cabochon 29x24 mm no 43
Price: 58.00
Ammonite cabochon 29x24 mm no 43
Ammonite cabochon 30x20 mm no 48
Price: 66.00
Ammonite cabochon 30x20 mm no 48
Ammonite cabochon 30x21 mm no 44
Price: 63.00
Ammonite cabochon 30x21 mm no 44
Ammonite cabochon 30x21 mm no 64
Price: 50.00
Ammonite cabochon 30x21 mm no 64
Ammonite cabochon 30x22 mm no 30
Price: 54.00
Ammonite cabochon 30x22 mm no 30
Ammonite cabochon 30x23 mm no 24
Price: 79.00
Ammonite cabochon 30x23 mm no 24
Ammonite cabochon 30x23 mm no 57
Price: 60.00
Ammonite cabochon 30x23 mm no 57
Ammonite cabochon 30x24 mm no 23
Price: 62.00
Ammonite cabochon 30x24 mm no 23
Ammonite cabochon 30x24 mm no 27
Price: 70.00
Ammonite cabochon 30x24 mm no 27
Ammonite cabochon 30x24 mm no 51
Price: 64.00
Ammonite cabochon 30x24 mm no 51
Ammonite cabochon 30x24 mm no 68
Price: 61.00
Ammonite cabochon 30x24 mm no 68
Ammonite cabochon 30x26 mm no 14
Price: 70.00
Ammonite cabochon 30x26 mm no 14
Ammonite cabochon 31x21 mm no 31
Price: 68.00
Ammonite cabochon 31x21 mm no 31
Ammonite cabochon 31x22 mm no 18
Price: 71.00
Ammonite cabochon 31x22 mm no 18
Ammonite cabochon 31x22 mm no 50
Price: 63.00
Ammonite cabochon 31x22 mm no 50
Ammonite cabochon 31x24 mm no 54
Price: 71.00
Ammonite cabochon 31x24 mm no 54
Ammonite cabochon 31x24 mm no 61
Price: 74.00
Ammonite cabochon 31x24 mm no 61
Ammonite cabochon 31x25 mm no 21
Price: 71.00
Ammonite cabochon 31x25 mm no 21
Ammonite cabochon 31x25 mm no 28
Price: 77.00
Ammonite cabochon 31x25 mm no 28
Ammonite cabochon 31x26 mm no 36
Price: 76.00
Ammonite cabochon 31x26 mm no 36
Ammonite cabochon 32x23 mm no 40
Price: 78.00
Ammonite cabochon 32x23 mm no 40
Ammonite cabochon 32x23 mm no 42
Price: 65.00
Ammonite cabochon 32x23 mm no 42
Ammonite cabochon 32x23 mm no 49
Price: 86.00
Ammonite cabochon 32x23 mm no 49
Ammonite cabochon 32x23 mm no 52
Price: 75.00
Ammonite cabochon 32x23 mm no 52
Ammonite cabochon 32x23 mm no 53
Price: 76.00
Ammonite cabochon 32x23 mm no 53
Ammonite cabochon 32x24 mm no 16
Price: 74.00
Ammonite cabochon 32x24 mm no 16
Ammonite cabochon 32x24 mm no 6
Price: 86.00
Ammonite cabochon 32x24 mm no 6
Ammonite cabochon 32x25 mm no 20
Price: 65.00
Ammonite cabochon 32x25 mm no 20
Ammonite cabochon 33x23 mm no 38
Price: 81.00
Ammonite cabochon 33x23 mm no 38
Ammonite cabochon 33x23 mm no 41
Price: 86.00
Ammonite cabochon 33x23 mm no 41
Ammonite cabochon 33x26 mm no 13
Price: 87.00
Ammonite cabochon 33x26 mm no 13
Ammonite cabochon 33x26 mm no 22
Price: 71.00
Ammonite cabochon 33x26 mm no 22
Ammonite cabochon 34x25 mm no 35
Price: 97.00
Ammonite cabochon 34x25 mm no 35
Ammonite cabochon 34x26 mm no 25
Price: 82.00
Ammonite cabochon 34x26 mm no 25
Ammonite cabochon 34x26 mm no 33
Price: 97.00
Ammonite cabochon 34x26 mm no 33
Ammonite cabochon 34x27 mm no 19
Price: 119.00
Ammonite cabochon 34x27 mm no 19
Ammonite cabochon 35x27 mm no 3
Price: 107.00
Ammonite cabochon 35x27 mm no 3
Ammonite cabochon fi 25 mm no 55
Price: 63.00
Ammonite cabochon fi 25 mm no 55
Ammonite cabochon fi 25 mm no 65
Price: 63.00
Ammonite cabochon fi 25 mm no 65
Ammonite cabochon fi 27 mm no 37
Price: 73.00
Ammonite cabochon fi 27 mm no 37
Ammonite cabochon fi 27 mm no 59
Price: 67.00
Ammonite cabochon fi 27 mm no 59
Ammonite cabochon fi 30 mm no 9
Price: 104.00
Ammonite cabochon fi 30 mm no 9
Ammonite cabochon fi 31 mm no 11
Price: 119.00
Ammonite cabochon fi 31 mm no 11
Ammonite cabochon fi 31 mm no 12
Price: 109.00
Ammonite cabochon fi 31 mm no 12

Origin and occurrence of ammonites

Ammonite fossils are found on nearly every continent. Notable sources include:

  • Morocco – extensive Jurassic and Cretaceous deposits,
  • Madagascar – large and visually striking specimens,
  • Germany and France – classic paleontological localities,
  • Canada – ammonites with preserved iridescent aragonite (ammolite).

Uses of ammonites

Ammonites are used in:

  • artistic and bespoke jewelry,
  • private fossil collections,
  • geological and educational displays,
  • natural interior decoration.

Scientific significance

From a geological perspective, ammonites are important index fossils used in biostratigraphy to date sedimentary rock layers. Their rapid evolutionary changes and wide distribution make them essential for reconstructing the geological history of the Mesozoic era.

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