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Yes, this is a rather nice find; an ammonite of the Jurassic in central Europe. Given the size of the specimen, and its appearance, this appears to be of the species Cardioceras, or Perisphinctes. These ammonoids belong to the Class Cephalopoda, the coiled cephalopods. They lived about 160 million years ago. The Order of ammonites to which Cardioceras and ...


3

The question is in regard to pressure confining a rare, deep-mantle formed mineral visible within a diamond inclusion. The pressure on the inclusion within the diamond crystal is really the pressure of confinement within the crystalline lattice of carbon that makes a diamond what it is. Let's digress for a moment. A diamond is a covalent crystal. Each ...


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