Natural Ammonite - Perisphinctes dendrite All of these pockets eventually

All of these pockets eventually died out due to the lack of genetic diversity that comes from metropolitan interactions with larger populations

Above: Macro Image - Samples of Mount Fuji Lava

No horns sat over their noses

the crystals are transparent on their own

and the specimen measures approximately 1cm x 1cm

Natural Ammonite - Perisphinctes dendrite All of these pockets eventuallyAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a natural Perisphinctes fossil from Madagascar. The animal's shell has been fossilized is exquisite detail and the ribbed, logarithmic pattern it had in life is clearly visible in this incredible display piece.