What deep time
sells for.
Market prices for fossils — by species, size, and quality — tracked across dealers and auction houses since 2019.
Specimens
| Specimen | Material | Quality | Size | Latest price | Kind | Date | Source |
|---|
Price evolution
Fossil valuation
Closest tracked specimens
Deal finder
How the curve is fit
On the market now — best deals first
| Listing | Element / Quality | Size | Price | Typical | Vs. typical | Source |
|---|
How much are Ammonites worth?
A clean 5.4-inch Ammonites, the median size we see, typically sells for $94. Fitted from 1,169 tracked specimens, adjusted for size, condition and variety.
Ammonites price by size
| Size | Typical price | Usual range |
|---|---|---|
| 10 in | $404 | $197 – $828 |
| 20 in | $3,040 | $1,484 – $6,228 |
| 30 in | $11,952 | $5,835 – $24,480 |
Ammonites listings on the market now
We're tracking 202 live Ammonites listings. The one furthest below its fitted value is priced 93% below the curve at $2. The Deal Finder ranks all of them.
Recent Ammonites sales and listings
| Specimen | Size | Price | Seen |
|---|---|---|---|
| 12" Ammonite Fossil with Mosasaur Bite Marks - Precious Ammolite! | 12 in | $27,500 | 2026-08-16 |
| Iridescent Ammonite in Matrix | — | $21,000 | 2026-08-16 |
| 12.6" Green-Blue Ammonite Preserved In Ammolite - Canada | 12.6 in | $19,500 | 2026-08-16 |
| Septarian With Orange Calcite & Partial Ammonite - "The Raven" partial | — | $8,500 | 2026-08-16 |
| Pyritized Ammonites - Holzmaden Shale, 3.54’ | — | $4,500 | 2026-08-16 |
| 7.3" Cretaceous Heteromorph Ammonite (Didymoceras) - South Dakota | 7.3 in | $4,495 | 2026-08-16 |
| Ammolite Piece with Vibrant Blue - 9.5” | — | $2,800 | 2026-08-16 |
| 15" Massive, White Ammonite Fossil (68 Lbs) - Madagascar | 15 in | $1,650 | 2026-08-16 |
How this valuation is calculated
Price is regressed on log size, with a quadratic term so the exponent rises with size, plus condition, element, variety and form. Recent sales carry more weight, so the curve tracks the current market. Full details on the methodology page. You can also see the price history or appraise your own specimen.