Fish Fossil - Knightia Eoceana

Fish Fossil - Knightia EoceanaDuring the Eocene, 40 50 million years ago, vast shoals of freshwater fish inhabited a large shallow inland sea across the American West. The herring like fish of the genus Knightia were far and away the most abundant freshwater fish during this era, and because of this they are one of the most frequently found vertebrate fossils on earth. Originating from the famed Green River Formation in Wyoming, fossils of Knightia eocaena and their close

Aquamarine has a hexagonal crystal structure and is highly prismatic

especially due to its highly fluorescent or UV reactive nature

Aragonite is an incredibly variable mineral

Due to its incredibly vivid and deep coloration

the mineral contains arsenic and silicate and historically has been used in pyrotechnics as well as a cosmetic since ancient Egyptian times until the safety issues with arsenic in makeup became known

in iron smelting and other metallurgy

Flexycalymene Trilobite Geodes are approx

Metacanthian Trilibite from the Mid Devonian Period

and under optimal conditions these insects will be clearly visible within the fossilized amber pieces

These fine specimens have rich yellow-gold fine crystals covering a thick white matrix

creating a striking and colorful contrast

Fluorite has long been used as a gemstone and is increasingly popular in the market as both natural specimens and cut gems