These ammonites from Russia are pyrite replaced. The interior chambers are generally hollow and lined with pyrite crystals. Quenstedtoceras sp. Quantity in Basket: None Code: FA-100 Price: $25.00 Shipping Weight: 0.18 pounds Quantity: Time: Middle Jurassic, Collovian Stage, approximately 164 million years ago. Location: Saratov Region, Volga River, Russia Dimensions: 1 - 2 inches tall Price is $25.00 per each