Close-up of extra-small calcified ammonite half fossil showing crystalline calcite chambers and iridescent shell
Extra-Small Calcified Ammonite Half From Madagascar (10 grams)
Extra-Small Calcified Ammonite Half From Madagascar (10 grams)
Extra-Small Calcified Ammonite Half From Madagascar (10 grams)
Extra-Small Calcified Ammonite Half From Madagascar (10 grams)

Vendor:Astro Gallery of Gems

Extra-Small Calcified Ammonite Half From Madagascar (10 grams)

$24.00

Fossilized ammonite half revealing internal chambers lined with calcite crystals. This piece shows areas of the original mother of pearl iridescent outer shell, sliced and polished from a complete ammonite. From the Late Cretaceous age, this specimen offers a glimpse into prehistoric ocean life preserved in natural mineral replacement.

  • Weight: 10 grams
  • Dimensions: 1.75L x 0.25W x 1.5H inches
  • Material: Calcite crystal lined fossil with mother of pearl shell areas
  • Origin: Madagascar
  • Age: Late Cretaceous (70–75 million years)
  • Comes with Certificate of Authenticity

A Natural Window to Ancient Oceans

Extra-Small Calcified Ammonite Half

Fossil Details

Material and Measurements

Material
Fossilized ammonite with calcite crystal chambers and mother of pearl shell
Weight
10 grams
Dimensions
1.75 inches length x 0.25 inches width x 1.5 inches height
Geological Age
Late Cretaceous (approximately 70–75 million years)
Origin
Madagascar
Surface
Polished to reveal internal cavities
Authenticity
Comes with Certificate of Authenticity
Vendor
Astro Gallery of Gems
Product Type
Fossils

What arrives

One extra-small calcified ammonite half fossil of approx. 10 grams
Certificate of Authenticity

Physical Attributes

Size and Weight

Ideal for display or as a study specimen illustrating fossilized ammonite internal structure.

Order Information

Shipping and Returns

Shipping

Shipping rates and delivery times vary by destination. Please see checkout for estimates.

Returns

Please refer to checkout for return policy details.
Close-up of extra-small calcified ammonite half fossil showing crystalline calcite chambers and iridescent shell

Small, held history

An amber spiral of calcite chambers; a whisper of mother-of-pearl catching the light.

From deep time

A Late Cretaceous pause on your desk

Each slice, singular

Shelves and worktables crave meaning, not clutter. The Extra-Small Calcified Ammonite Half From Madagascar brings a defined focal point in a size that fits the hand—about 1.75 by 1.5 inches, only 10 grams—so it rests anywhere without demanding attention. Polished to reveal intricate internal chambers lined with calcite micro crystals, it turns a glance into a moment. A stock photo stands in; yours will carry its own quiet variations.

Calm, rooted presence

Objects with real age slow a room. This ammonite half—formed roughly 70–75 million years ago—anchors a shelf or studio corner with a clear, natural geometry. Subtle flashes of original iridescence on the outer shell meet warm crystal structure within, creating a small daily ceremony of looking.

For the collector at home

Someone who curates a desk, nightstand, or bookshelf with pieces that invite touch and conversation, and values authentic natural history.

Quiet placements

Set it near a reading chair or on a worktable where light can skim the calcite chambers and catch the mother-of-pearl.
Astro Gallery of Gems brand cover

About Astro Gallery of Gems

Specialists in Fossils and Gemstones

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.
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Questions About This Fossil?

FAQs

How big is the Extra-Small Calcified Ammonite Half?
It measures approximately 1.75L x 0.25W x 1.5H inches and weighs about 10 grams.
Will the piece look exactly like the photo?
No—these are natural fossils and the listing uses a stock photo; you will receive a similar ammonite with its own unique patterning and color.
What parts of the ammonite are visible?
The slice reveals internal chambers lined with calcite micro crystals, while areas of the outer shell show hints of original mother-of-pearl iridescence.
How old is this ammonite?
It dates to the Late Cretaceous, approximately 70–75 million years ago.
Is documentation included?
Yes, a Certificate of Authenticity is included.