Polished calcified ammonite half showcasing internal calcite crystals and iridescent mother of pearl shell
Calcified Ammonite Half (5") From Madagascar
Calcified Ammonite Half (5") From Madagascar
Calcified Ammonite Half (5") From Madagascar

Vendor:Astro Gallery of Gems

Calcified Ammonite Half (5") From Madagascar

$79.00

The Calcified Ammonite Half from Madagascar reveals the internal chambers lined with calcite crystals in a fossilized psuedomorph of calcite after ammonite. This polished half exposes the intricate internal cavities with micro crystals and retains small areas of the original mother of pearl iridescent outer shell, making it a captivating fossil display piece. Each piece varies slightly in pattern, color, and shape.

  • Fossilized calcite after ammonite halve
  • Internal chambers visible with calcite micro crystals
  • Partial mother of pearl iridescent outer shell
  • Complete ammonite sliced and polished
  • Approximate size: 4 x 1 x 5 inches
  • Approximate weight: 1.2 lbs

A Singular Fossil Specimen

Essential Details of Your Calcified Ammonite Half

Dimensions and Features

Complete Ammonite Section Revealing Internal Crystals

Type
Fossil
Material
Calcite, Ammonite
Condition
Polished half section
Size
Approx. 4 x 1 x 5 inches
Weight
Approx. 1.2 lbs
Origin
Madagascar
Shell
Partial mother of pearl iridescence

What arrives

One calcified ammonite half fossil

What to Expect in Form and Appearance

Unique Variation in Pattern, Color, and Shape

Shipping, Returns, and More

Check Out for Shipping Estimates

Shipping

Shipping cost and timing vary; see checkout for estimates.

Returns

Refer to checkout for return policy details.
Polished calcified ammonite half showcasing internal calcite crystals and iridescent mother of pearl shell

Quiet timekeeper

A single ammonite half, sliced and polished, its chambers glinting with calcite like city lights after rain.

Held in the hand

Calcified Ammonite Half (5") From Madagascar

One spiral, many rooms

Walls and shelves can feel fleeting—objects arrive without memory. This Calcified Ammonite Half brings a grounded sense of time, its internal chambers lined with calcite micro crystals that catch light in small, steady flashes. Subtle bands of brown and cream, with traces of mother‑of‑pearl on the outer shell, read like a natural print. At roughly 4 x 1 x 5 inches and about 1.2 lbs, it rests with quiet confidence.

Calm, mineral light

The spiral pulls the eye and slows the room, inviting a pause where conversation gathers. A complete ammonite, sliced to reveal its architecture, adds history without noise. Each piece is unique—stock photo shown—so what you place is singular, like a found sentence in a favorite book.

For the collector at home

Someone who arranges objects with intention and wants an authentic fossil presence on a desk, shelf, or console.

Place and live with it

Set it on a shelf or tabletop where natural or directed light can reach the calcite-lined chambers.
Astro Gallery of Gems brand cover

From the Collection

Astro Gallery of Gems

Family-owned since 1961, Astro Gallery of Gems began with Julio Tanjeloff’s conviction that exceptional mineral specimens belonged in homes as well as collections. The Fifth Avenue gallery in New York became a destination for collectors, designers, museums and people discovering gems and minerals for the first time. Astro specializes in fine minerals, gems, fossils, crystals, natural-history objects and rare jewelry—offerings that range from approachable specimens to large collector pieces. The gallery combines collecting, education, curation and natural history to help buyers select pieces chosen for color, formation, texture and visual presence. Compare listed dimensions, origin details and natural variations to find a specimen worth keeping in view.
Explore Astro Gallery of Gems

Common Questions About This Fossil

Calcified Ammonite Half FAQ

How large is the ammonite half?
Approximately 4 x 1 x 5 inches and about 1.2 lbs.
Will the piece look exactly like the photo?
No—this is a stock photo. You will receive a similar item with its own pattern, color, and shape variations.
What is visible inside the spiral?
The internal chambers are lined with calcite micro crystals, revealed by slicing and polishing the complete ammonite.
Is any original shell surface present?
Yes, small areas show the ammonite’s original mother‑of‑pearl iridescent outer shell.
Where is this ammonite from?
It is from Madagascar.