"Orthoceras" in Latin means "Straight horn" – this is a fossil of an ancient cephalopod marine mollusk with a spectacular natural pattern. Moroccan deposit.
Frame: Author's, handmade, made of 925 * silver with blackening, in the lower part of the ring shank there is a nameplate and a sample of the State Assay Chamber.
The size of the stone is 55x19x9 mm, the weight is 13.63 g.