AmmoliteAmmoliteBear Paw Formation, Alberta, CanadaIridescent ammonites are found along the eastern slopes of the Canadian Rockies, in a locality famous for its brilliantly colored fossil ammonites. Formerly confused with opals, ammolite is actually composed of aragonite and not silica. Known as the Canadian national gem, ammolite, it is one of only three biogenic gemstones known to exist (the other two being amber and natural pearls.) Ammolite is hand cut using the same techniques as opal cutting. The present oval-shaped ammolite shows various colors such as green, yellow, blue-green, orange and red. Weighing approximately 15.79 carats and measuring 22.13 x 19.54 x 3.94mm None