Rare 10.3" Argonauticeras Ammonite - Amber Colored Crystals

This is a rare Argonauticeras collected near Befandriana, Madagascar which has been cut in half and polished. Many of the inner chambers are lined with amber colored calcite crystals. I have not seen any other similar Argonauticeras ammonites for sale, and this is one of only three I was able to acquire recently. Each half of the ammonite is 10.3" wide, 2.3" thick and weighs around 7 lbs.

Like most large ammonites there is some repair work, to where they had been broken in the ground and put back together.