Reviews
1 1/2" Silver Iridescent Ammonite Fossils
These are beautiful, approximately 110-million-year-old silver iridescent ammonite fossils from the Mahajanga Province of Madagascar. Most specimens are the species Cleoniceras, though a small number of closely related ammonite species may also be included. Each ammonite averages about 1.5" wide, with slight natural variation, and features striking metallic silver iridescence that flashes as the light moves across the surface.
The photos shown are representative examples; you will not receive the exact specimens pictured. Quantity discounts are available for multiple pieces.
The photos shown are representative examples; you will not receive the exact specimens pictured. Quantity discounts are available for multiple pieces.
About Silver Iridescent Ammonite Fossils
Silver iridescent ammonite fossils from Madagascar are striking cut-and-polished fossils that display a brilliant, metallic silver flash across their coiled chambers, often shifting to subtle blues and greens as the light moves. This shimmering effect is caused by ultra-thin, microscopic layers within parts of the shell or mineral replacement that act like a natural light prism, reflecting and amplifying certain wavelengths through interference. The result is a sleek, chrome-like iridescence that contrasts beautifully with crisp white calcite septa tracing elegant patterns through the spiral, making these specimens exceptional display pieces.
Ammonites are extinct marine mollusks related to modern nautiluses, squids, and octopuses that lived in Earth’s oceans from the Devonian through the end of the Cretaceous Period, when they disappeared alongside the dinosaurs. They built coiled, chambered shells, adding new chambers as they grew and using gas-filled compartments to help control buoyancy. Because ammonites evolved rapidly and were widespread, they are among the most important index fossils used by geologists to date and correlate rock layers around the world.
Silver iridescent ammonite fossils from Madagascar are striking cut-and-polished fossils that display a brilliant, metallic silver flash across their coiled chambers, often shifting to subtle blues and greens as the light moves. This shimmering effect is caused by ultra-thin, microscopic layers within parts of the shell or mineral replacement that act like a natural light prism, reflecting and amplifying certain wavelengths through interference. The result is a sleek, chrome-like iridescence that contrasts beautifully with crisp white calcite septa tracing elegant patterns through the spiral, making these specimens exceptional display pieces.
Ammonites are extinct marine mollusks related to modern nautiluses, squids, and octopuses that lived in Earth’s oceans from the Devonian through the end of the Cretaceous Period, when they disappeared alongside the dinosaurs. They built coiled, chambered shells, adding new chambers as they grew and using gas-filled compartments to help control buoyancy. Because ammonites evolved rapidly and were widespread, they are among the most important index fossils used by geologists to date and correlate rock layers around the world.
$5
Quantity Discounts
3 to 9 Pieces
$4
10+ Pieces
$3
FOSSIL TYPE
Ammonites
SPECIES
Various
AGE
Middle Cretaceous
LOCATION
Mahajanga Province, Madagascar
SIZE
~1 1/2 to 2" wide
PRODUCT ID
P-544
