Ce spécimen montre la magnifique couche irisée et nacrée de sa coquille fossilisée, ce qui demeure une caractéristique de cette espèce. On distingue donc une luxuriante et vraiment esthétique palette de couleurs. Le spécimen a une qualité de gemme du fait de l'Ammolite, matière semi-précieuse qui le recouvre et qui provient de la couche de nacre qui s'est chimiquement  transformée en matériau irridescent. L'ammonite acquiert l'apparence d'une pierre précieuse similaire à l'Opale et fractionne la  lumière blanche en générant un arc en ciel de couleurs. Cette précieuse ammonite a été excellemment préparée, polie puis finalement recouverte d'une imperceptible pellicule de protection qui la protège et intensifie encore s'il y a lieu sa brillance naturelle.



This naturally round specimen displays the beautiful iridescent nacreous layer of its fossilized shell, characteristic of this species, with a gorgeous and visually appealing play of colours. During fossilisation, the nacreous layer was chemically transformed into the iridescent material called ammolite. This is an opal-like gemstone that separates the light and generates a rainbow of colours for the viewer. This precious ammonite has been excellently prepared, polished and finally coated by a protective film which intensifies the natural brilliance of the colours.

Collection d'un musée privée R.F.A

this exceptionnal piece is in perfect condition. no restoration. the cracks visible on the picture of the catalogue are completly natural, it doesn't week the ammonite at all. opalescence on shell looks motly red but reflects may because of tilts in green, yellow or red orange. the back of the ammonite is partly opal with visible traces on the matrix. (It is sadly impossible to remake those wonderfull colors on pictures). very attractive piece
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."