OPALIZED FOSSIL STONE- AMMONITE, 'TUBES' Calgary Canada
Segments of a former conch spiral. Opalised into rainbow hues from which Canadian jewelry is made. Bought in 1980s at a large workshop with collections in Alberta, Canada. Large piece 11 cm long. Short piece 6 cm long x 5cm wide Photos: No. 2 is of the long section. Nos. 3-4 show both ends of both pieces. Photos 5-6 are of the short section. See photo of background of the material the fossil is make of as part of the stone becomes opal.