Trilobite in Shale (Elrathia sp.) - Utah Chemical Formulas: CuSiO2(OH)2

Chemical Formulas: CuSiO2(OH)2

You will receive the slab pictured

Astrophyllite is a very rare

There is one hairline fracture near the tip of the tooth that was likely stabilized

Here is another great example of smoky quartz

Trilobite in Shale (Elrathia sp.) - Utah Chemical Formulas: CuSiO2(OH)2Trilobites are considered one of the most successful groups of animals to ever live on planet Earth. They lived for over 300 million years and there have been more than 20,000 different species identified. These creatures are members of the phylum Arthropoda. These animals are classified as having segmented bodies with an exoskeleton to protect their organs and muscles. Living examples include insects, spiders, crabs, lobsters, scorpions, and