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such as on this specimen
with a crystal filled center seam
A beautiful striped variety of flint formed in layers of dark and light bands
created through an arduous process of joining several materials together and curing them to produce these stunning pieces
where the holes of worms that bored into the wood have been preserved during agatizing
Mammoth Ivory in Riker Box cabochon such as on this specimenFossil Ivory of the Four tusker Mastodon (Gomphotherium Osborni) from the Miocene era. Comes in Riker box with information card. Valentine Formation, Niobrara River, Western Nebraska Size: Specimen: 5. 75" x 1. 25" x 1. 4" Display Box: 8. 25" x 6. 25" x 2. 25"