- Fossil type
- Natural pyritized ammonite fossil
- Origin
- Aveyron, France
- Treatment
- Stabilized
- Form
- Whole specimen
- Size
- 23.5mm
- Weight
- 5.82g
- Hardness
- 6-6.5
Natural Pyritized Ammonite 5.82g 23.5mm
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A large pyritized ammonite with warm gold-bronze tones and dramatic, well-spaced ribbing clearly visible on the lower whorls, with strong relief and clear separation between ribs. The upper portion has a rougher, more degraded surface; the intact ribbed section is the standout feature.
The combination of large size and prominent well-preserved ribbing makes this a high-impact display fossil. Natural pyritized ammonite from Aveyron, France, Jurassic period, 23.5mm across.
Natural pyritized ammonite from Aveyron, France, sold as a single specimen.
We ship worldwide from Sofia, Bulgaria. Every order is packed in a protective box with bubble wrap. Orders within Bulgaria are dispatched within 1-2 business days and international orders within 2-3 business days. Free shipping is applied automatically at checkout, and the threshold applies to the order value after any discounts.
Delivery within Bulgaria
- Delivered by Speedy, Econt or Box Now, to a courier office, a locker or your address.
- Fixed prices: Box Now locker €1.60 (free on orders from €25), Speedy office €3.20, Econt office or locker €4.00, Speedy to your address €4.50.
- Free shipping on orders over €50, with any courier and at any weight.
- Cash on delivery is available.
- Delivery normally takes 1-2 business days after dispatch.
- Keep dryThe shell of this ammonite has been replaced by pyrite, which can slowly decay in damp air. A white powder or a sulfur smell are the first signs. Do not wash it: dust it with a soft brush, dry it at once if it gets wet, and store it somewhere dry, ideally with a silica gel sachet.
- Hardness
- 6-6.5
- Cleavage
- None
- Durability
- Fair
- Soapy water
- Avoid
- Ultrasonic
- Avoid
- Steam
- Avoid
About pyritized ammonite
Ammonites are fossil shells of extinct sea animals related to today’s octopus and squid. In a pyritized ammonite the shell was replaced by pyrite, an iron sulfide that gives it its metallic golden shine and a hardness of 6 to 6.5 on the Mohs scale.
Cleaning
Do not wash it. Dust it with a soft dry brush or an air blower, and handle it with clean, dry hands. Skip ultrasonic and steam cleaners: moisture and heat speed up pyrite decay. Keep it away from acids, even lemon juice and vinegar.
Wear and storage
Store it on its own in a dry box or a soft pouch, away from bathrooms, kitchens and damp rooms. Harder stones such as quartz can scratch it, so keep it apart from them.
Scale
True to scale: 23.5 mm
Shown next to a €1 coin (23.25 mm) in the exact ratio, so you can picture the real size.
