Mined from: Mahajanga Province, Madagascar

Era: Early Cretaceous
Geological Age: 100–113 mya

Description: These Cleoniceras ammonite fossils with exposed sutures from Madagascar are striking fossil specimens that beautifully showcase the intricate internal suture patterns of these ancient marine cephalopods. The exposed sutures create a highly detailed, lace-like or fern-like pattern across the polished fossil surface, making each piece both scientifically fascinating and visually dramatic. With their classic spiral form, natural chamber structure, and earthy tones ranging from cream and tan to brown and grey, these fossils make exceptional display pieces for collectors, educators, and natural history enthusiasts.

Cleoniceras is an extinct ammonite genus from the Early Cretaceous, and Madagascar is one of the best-known sources for these beautifully preserved specimens. Many Cleoniceras fossils from Madagascar are cut and polished to reveal the internal chambering and complex suture lines, which are the wavy junctions between the shell walls and septa. These exposed sutures are especially prized because they highlight both the fossil’s prehistoric age and its natural geometric beauty.

Spiritually, ammonite fossils are often associated with transformation, grounding, ancient wisdom, and the cycles of life. Their spiral form is commonly seen as a symbol of growth, evolution, and continuity, while exposed sutures add an extra sense of mystery and ancient complexity.

Small
Approximate Size of 1 piece: 64mm x 52mm x 28mm
Approximate Weight of 1 piece: 88g

Medium
Approximate Size of 1 piece: 69mm x 55mm x 32mm
Approximate Weight of 1 piece: 128g

Large
Approximate Size of 1 piece: 74mm x 60mm x 34mm
Approximate Weight of 1 piece: 184g

XL
Approximate Size of 1 piece: 90mm x 65mm x 39mm
Approximate Weight of 1 piece: 258g

XXL
Approximate Size of 1 piece: 96mm x 78mm x 41mm
Approximate Weight of 1 piece: 368g

Quantity: 1pc

We do our best to buy quality products- although not every rock is the same. If you choose to purchase the "staff pick option", we will select the best of the batch for you. Otherwise, it will be at random from the larger batch we have in stock.