1.80" Red Flashy Iridescent Ammonite Fossil - Madagascar | Fossil Driven

Specifications

• Specimen: Red iridescent ammonite
• Size: 1.80" across
• Color: Vivid red with orange/gold flashes
• Geological Age: Late Cretaceous (70–110 million years old)
• Material: Fossilized aragonite (ammolite layer)
• Finish: Professionally polished
• Display: Ready for collection or décor
• Condition: Natural fossil; no artificial coloring

This specimen represents an iridescent ammonite from the Late Cretaceous (70–110 million years ago). Ammonites were marine cephalopods related to squids and octopuses. Their shells were originally made of aragonite, a mineral that can undergo interference iridescence when compressed and preserved under the right geological conditions.

Red is among the most desired colors in iridescent ammonites because it requires precise fossilization conditions; the microscopic layering of aragonite plates refracts light to produce brilliant red fire. These structural color layers are the same phenomenon responsible for the vibrant flashes seen in opal and certain species of mollusks.

At 1.80 inches, this specimen offers exceptional coloration for its size, with polished chamber details that emphasize both its scientific significance and its natural beauty.