About the product:

🪨 Fossil Type: Ammonite 'Tractor' douvilleiceras mammilatum

🌍 ⛏️ Origin: Majunga, Madagascar

📐 💎 Dimensions: 55 millimeters long x 40 wide x 26 thick

⚖️ Weight : 55.3 grams

✨ Finish: natural

🔬 Treatment: None

🎁 Comes with a Gem and Zen certificate, ideal for giving as a gift or treating yourself!

✦ Uses:

Highly ornamented, the Douvilleiceras shell is prized by collectors.

Sometimes used in fossil jewelry or decoration, especially after polishing.

Evidence of the rapid evolution of ammonites in the Cretaceous.

Allows precise stratigraphic dating (guide fossil)

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📋 Mineralogical sheet:

Appearance	Tractor Ammonite (Douvilleiceras mammillatum)

Category

Fossil / Marine Cephalopod (Ammonite)

Geological age

Lower Cretaceous (~100 – 120 million years ago)

Chemical composition

Mainly aragonite (CaCO₃), often replaced by calcite, silica or pyrite during fossilization

Crystal system

Orthorhombic (aragonite)

Hardness (Mohs)

3.5 – 4

Density

2.6 – 2.9

Color

Beige, brown, black, gray, sometimes with colored patina due to surrounding minerals

Glow	Matte to pearly depending on fossilization

Transparency

Opaque

Special feature

Fossil with a very robust, thick shell decorated with ribs and tubercles reminiscent of tractor wheels → hence its name

Main deposits

Madagascar (very famous), Morocco

Discovery / History

Species scientifically described in the 19th century; today highly sought after in collections for its atypical morphology

Use	Collection, decoration, lithotherapy (fossil energy, stability)

Virtues (lithotherapy)

Provides grounding, stability, protection and perseverance ; supports in long and difficult trials

Associated Chakras

Root (anchoring), Solar Plexus (inner strength, endurance)

Astrological signs

Capricorn, Taurus, Scorpio

Purification

Distilled water, gentle fumigation (sage, incense)

Recharging

Soft sunlight, waxing moon, quartz clusters

Short story

The “Tractor” Ammonite is an impressive variety with its massively ribbed shell , used as a symbol of strength, perseverance and memory of the Earth .