4.3" Kansas Amber (Jelinite) Specimen "Holy Grail Of Kansas Minerals"
In fact this exact specimen was referred to as the Holy Grail Of Kansas Minerals in this post.
It exhibits a vibrant yellow-orange coloration and is surprisingly light in weight, for its size. It is Lower Cretaceous in age, meaning it's roughly 125 million years old! Portions of this Jelinite specimen have been stabilized with glue to prevent further cracking and/or chipping.
Comes with an acrylic display stand and information card holder.
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.