Free Fedex Ground shipping in the United States! Very hollow amethyst cathedral geode that measures 16.4 inches tall, 10 inches across at the base, and is approximately 5 inches deep. The amethyst crystals have a darker purple color at their tips that grades to a very light purple to nearly clear color towards the interior. There is also a large, mound-like growth of amethyst in the back left bottom of the geode which is very colorful and adds something different to this cathedral than most. As is the case with most cathedral geodes coming from Brazil, the back has been painted. Price is $495.00.