Polished Ammonite Fossil Half Shell Specimen
This is a genuine ammonite fossil that has been cut and polished to show the spiral chambers inside. Ammonites were shelled sea creatures that lived with the dinosaurs until about 66 million years ago. Over time, minerals replaced the shell and filled the chambers, turning it into stone. The polished side reveals the full spiral, wavy lines between each chamber, and colors from amber to deep brown, with some crystal-filled pockets.
Ammonite Shell Features
- Authentic fossil specimen, not a resin cast or reproduction
- Cut and polished on one face to expose the internal chambers
- Visible suture lines tracing the chamber divisions
- Amber, caramel, and brown mineralization with crystal cavities
- Natural iridescence in some areas depending on the light
- Each order includes one hand-picked half. The size is about 6 to 7 inches (15 to 18 cm) across and weighs roughly 25 ounces (approximately 700 grams).
Ammonite Shell Benefits
The spiral shape of ammonites is easy to recognize and makes this polished fossil a great centerpiece for a desk, shelf, or table. The cut side stands out as a display piece, and its size helps it stand out in any space. Collectors value cut and polished ammonites because they show both the outside shape and the inside structure. This fossil also makes a thoughtful gift for anyone interested in paleontology or natural history.
Ammonite Shell Materials
The original shell, made of aragonite, has been replaced by calcite and other minerals over time. The chambers inside are usually filled with calcite or quartz, which creates the crystal pockets you see on the polished side. Most of these fossils come from Cretaceous marine deposits in Madagascar. The polished surface is made of stone and is durable, but the outer edge can chip if not handled carefully.
Ammonite Shell Usage Tips
- Show the polished side facing out by placing the fossil on a stand or leaning it against a support. A stand is not included, but small acrylic or metal easels work well for a stable and attractive display.
- Use a soft, dry cloth to dust the fossil. Do not use cleaners or solvents, as they can dull the polish. Keep the fossil in a stable, dry place to help it last. Try to avoid high humidity or sudden temperature changes, since these can affect the fossil and its minerals over time.
- Keep out of prolonged direct sunlight, which can fade the warmer tones
- Always use both hands to support the fossil, since the outer rim is the most likely part to chip.
- Set on felt or a soft pad to protect both fossil and furniture
Disclaimer
Size, shape, and color may vary from the photos. Each ammonite is a natural fossil, so no two specimens are identical.
