Eight Kansas Amber (Jelinite) Fragments - George Jelinek Collection

These are eight amber (Jelinite) fragments that were collected from the Kiowa Formation of Ellsworth County, Kansas. They are Lower Cretaceous in age, meaning the material is roughly 125 million years old! Only a very small amount of this material was collected, prior to the only location being flooded by a reservoir in 1949. This makes it some of the rarest amber in the world.

These are some of the last few available pieces from one of the original specimens found by George Jelinek. This is a once in a life time opportunity to own an unbelievably rare piece of American geological history!

They come together in an acrylic display case.

Jelinite is a rare fossil resin that was once collected within the Smoky Hills physiographic province. While there is evidence of early Kansas settlers having used the stones from this site for weapons and tools, the first documented discovery of the site was by George Jelinek in 1937-38. This resin was originally known as "kansasite", however was later renamed Jelinite in honor of the politician, archeologist and early collector of Jelinite, George Jelinek.

The rocks that surrounded the Jelinite formations were deposited on/near the sea floor during the Cretaceous Period. The tree resin was topped by layers of sandstone and limestone. Within these sandstone layers, impressions of leaves have been found that indicate the common trees of Ellsworth County during this time period were trees similar to modern willow, poplar, oak, sarsaparillas, sassafras, magnolias and laurel. The environment of Ellsworth County during the Cretaceous Period was much warmer and wetter, providing a favorable environment for these trees to thrive. This was during a time when much of western Kansas was under water, meaning the portions of Kansas that weren't underwater were considered coastal.

When this site was collectable, it was located along the Smoky Hill River in Ellsworth County, Kansas. Following periodic flooding of the river as a result of excessive rainfall, as well as the increasing population of the area, the construction of a dam commenced in 1948 to avoid further natural disasters. This dam created a reservoir that's known as the Kanopolis Reservoir. By 1949, the closing of the dam resulted in the initial Jelinite site being covered in water, only later to be buried by a landslide. Occasional amber finds around the area have been reported, however they're considered to be extremely rare.

Jelinite is quite brittle, has a hardness of 3 on the Mohs hardness scale and displays conchoidal to uneven fracturing. Under long wave UV, it exhibits bluish-green fluorescence. The basic chemical formula of Jelinite is C10H16O + (H2S), however this varies depending on the present impurities.
Ellsworth County, Kansas
Kiowa Formation
Largest piece .42" wide
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