Yellow Cat Fortification*Rough Pseudomorph

Beautiful Yellow Cat  Fortification with red lavender and a quartz in the center with a small area  calcite. The edges show crystal spray. The last picture is one that we have in our collection that shows very similar to what this one half will look like polished. 
Pseudomorphs are formed when one mineral reaplaces the original mineral, in this case the agate replaced the barite.
These pseudomorphs are very rare and not many are found, especially this large. These were found 30 years ago and we are starting to sell our collection.
Measures about: 4 inches x 2 3 1/2 inches x  2 1/4 inches thick, weighs 1 lb. 4 oz.