This auction has ended. View lot details
You may also be interested in
Lot 1029
Canadian Ammonite in Matrix
27 May 2010, 13:00 EDT
New YorkUS$10,000 - US$12,000
Looking for a similar item?
Our Natural History specialists can help you find a similar item at an auction or via a private sale.
Find your local specialistCanadian Ammonite in Matrix
Placenticeras costatum
Upper Cretaceous
Bearpaw Formation, Southern Alberta, Canada
Prized by collectors, the 70 -75-million-year-old ammonite specimens from the Bearpaw Formation display a spectacular palette produced by light interference by the shell’s layers. The flashing colors are produced not by opalization as is often thought, but by the ammonite’s own mother-of-pearl layer which has been fossilized. The present fine specimen, prepared in the matrix in which it was discovered, displays red, orange, gold and green, and also some uncommon blue coloration, which is highly desired by collectors. A spectacular piece, the luminous colors show in dramatic contrast to the deeply colored black shale. Measures 18 x 13in; Specimen measures 7.5in
Upper Cretaceous
Bearpaw Formation, Southern Alberta, Canada
Prized by collectors, the 70 -75-million-year-old ammonite specimens from the Bearpaw Formation display a spectacular palette produced by light interference by the shell’s layers. The flashing colors are produced not by opalization as is often thought, but by the ammonite’s own mother-of-pearl layer which has been fossilized. The present fine specimen, prepared in the matrix in which it was discovered, displays red, orange, gold and green, and also some uncommon blue coloration, which is highly desired by collectors. A spectacular piece, the luminous colors show in dramatic contrast to the deeply colored black shale. Measures 18 x 13in; Specimen measures 7.5in

