Ammonite Fossils with Spiked Spines / 1.5-2.5" AVG - 1 KILO LOT not select Average size range: 40 to

Average size range: 40 to 60 millimeters

In the case of prophecy stones

Gemstone Narmada Freeform Boulder

while commonly described as a jasper

often with intricate

Ammonite Fossils with Spiked Spines / 1.5-2.5" AVG - 1 KILO LOT not select Average size range: 40 toQuantity: 1 kilogram Average size range: 1. 5 to 2. 5 inches Ammonites were spiral shelled animals that lived hundreds of millions of years ago, and are most closely related to modern day octopi and cuttlefish than mollusks. The fossils for these species are so widespread that paleontologists and geologists use them as index fossils to determine when rock layers formed.