Natural Ammonite - Perisphinctes toothclaw Above: Front of the Specimen

Above: Front of the Specimen Card featuring NASA image STS07-32-1702

opals have held the attention of humans for many thousands of years

96" along the widest point

Our Neanderthal Stone Tool Specimens from the collection of a retired French postman

the first and largest of two production bismuth-phosphate chemical separations plants used to extract plutonium from fuel rods irradiated in the Hanford Site’s reactors

Natural Ammonite - Perisphinctes toothclaw Above: Front of the SpecimenAmmonites 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.