This is an excellent geode from the Hamilton, Illinois area. It was collected from a geode-bearing outcrop of shale located in the area. It was formed on an ancient sea floor some 350 million years ago during the Mississippian Period. This ancient environment now lays exposed in portions of Missouri, Iowa, and Illinois in an area known as the Keokuk Region, which boasts some of the world's best geodes. 

It is composed of an outer shell of chalcedony that has been filled with sparkling Quartz crystals. The crystals are well formed and have excellent luster and shine.  Some of them have a beautiful Citrine color to them.  Nestled in the quartz is a beautiful translucent Calcite crystal.  The crystal is superb with no defects or damage.  It is well formed and has beautiful luster and shine. 

The geode is approximately 4" in diameter and makes an excellent addition to any collection. 

Thanks for shopping at MoPop's Geodes and Rock Shop. 

Item #728