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*This approximate 5
5 inch across x 4
Trilobite approximately 1 3/4" long
Remnants of the free cheeks can also be seen below the trilobite molt
The back of the slab is the rough cut that hasn't been conditioned and polished showing the difference a good conditioning and polish can do in highlighting the mineral specimens unique characteristics of pattern
Sponge Choia carteri Dinosaur Bone *This approximate 5Very Rare and Excellently preserved intact fossilized sponge found in the Wheeler shale Utah West Desert. Age: Middle Cambrian (521 to 497 mya) Species Name: Choia carteri Order Family: Protomonaxonida Choiidae Phylum: Porifera Locality: Millard County, Utah Size: Approximately 5 1 2" x 4 1 2", 1. 80 lbs. Comes with metal stand. Choiidae is an extinct family of demosponges that lived from the Cambrian to the Lower Ordovician periods. These sponges