Market prices for fossils — by species, size, and quality — tracked
across dealers and auction houses since 2019.
retail listing
sold
auction result
monthly median
Specimens
Specimen
Material
Quality
Size
Latest price
Kind
Date
Source
Price evolution
A size- and quality-adjusted price index per fossil type (hedonic regression),
indexed to 100 at each series' first period. Unlike $/inch, this isolates real
price movement from changes in size and quality mix — so the lines show how each
type actually appreciated, on a common scale. Switch to Standard specimen $
to read the fitted dollar price of a median-sized, clean specimen of each type over
time. Most lines are quarterly; thin-but-tradeable series (e.g. T. rex teeth) fall
back to an annual index, marked in the legend. Single-species lines are most
reliable; "(various)" groups, annual lines, and pre-2023 levels (from archived
listings that captured only top-priced items) are noisier — read those as indicative.
Fossil valuation
Describe your fossil and we'll appraise it against every sale we've tracked —
the same size-, condition-, and variety-adjusted model behind the Deal Finder.
Asking-price based; a fast private sale usually lands below the low end.
Condition
Estimated market value
–
Closest tracked specimens
Deal finder
Pick a fossil type. We fit the market's price-vs-size curve from every sale we've
seen (adjusting for size, completeness, skeletal element, and variety), then rank
what's listed right now by how far it sits below that typical price.
How the curve is fit
On the market now — best deals first
Listing
Element / Quality
Size
Price
Typical
Vs. typical
Source
How much is a Mosasaur bone worth?
A clean 4.2-inch Mosasaur bone, the median size we see, typically sells for $305. Fitted from 100 tracked specimens, adjusted for size, condition and variety.
Mosasaur bone price by size
Size
Typical price
Usual range
5 in
$414
$249 – $690
10 in
$1,239
$744 – $2,064
15 in
$2,153
$1,293 – $3,586
20 in
$3,062
$1,839 – $5,099
Fitted asking price for a clean specimen with no stated defects. The range is roughly the middle two-thirds of the market at that size; individual specimens vary with preservation, colour and locality.
What condition does to the price
Stated defect
Effect on price
partial
-14%
Measured against otherwise comparable specimens of the same size, from how dealers describe them in the listing title.
Mosasaur bone listings on the market now
We're tracking 2 live Mosasaur bone listings. The one furthest below its fitted value is priced 77% above the curve at $145. The Deal Finder ranks all of them.
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.