Analytical market data of rough Ammolite price per carat USD. How do we calculate this data? CLICK HERE

Ammolite10-20 ct70-90$1.17-$0.01$1.19$1.12Low
Current and historical Ammolite market price index:
Current price per carat by date 2016.
Rough average pricing scale.

Price per carat by year end.
Physical Properties of Ammolite:
Chemical:CaCO3, Calcium Carbonate.
Fracture:Uneven to Granular
Color:Gray to brown, can be radiant blue,with primarily red to green iridescence
Crystal System:Orthorhombic
Specific Gravity:2.60 - 2.90
Hardness:4.50 - 5.50
Tenacity:Very Brittle
Luster:Greasy to Dull
Refractive Index:1.52 - 1.68

Canada 90%, United States, Madagascar

Gem-quality Ammolite produces a spectacular display of iridescent color when it is observed in reflected light. The colors of an individual stone can run the full range of the visible spectrum or be limited to just one or two colors. The color display can rival fine opal and Labradorite in its intensity and beauty. Ammolite is a name given to a thin iridescent aragonite shell material that is found on two species of extinct ammonite fossils, Placenticeras meeki and Placenticeras intercalare.Significant deposits of gem-quality Ammolite are only found in the Bearpaw Formation that extends from Alberta to Saskatchewan in Canada and south to Montana in the USA. However, small deposits have been found as far south as Central Utah which also contains gem-quality Ammolite. The best grade of gem quality Ammolite is along high energy river systems on the eastern slopes of the Rockies in southern Alberta.Ammolite often has a flaky or “dragon skin” surface. To an extent, this is normal, but excessive scaling will reduce Ammolite’s value. Almost all Ammolite gemstones are assembled through a ‘layering’ enhancement. Layering is common in the gem trade and it is most often seen with precious opal in the form of doublets or triplets. Layering treatments enhance durability and in most cases, can also enhance color.

Back to Top