**SORRY, THIS ITEM IS SOLD**A Magnificent Septarian Fossil! How did this unparalleled, egg-shaped "Shield of the Tortoise" come to be? Well, for inquiring minds out there: Septaria were formed during the Cretaceous Period, 50-70 million years ago when sea levels were much higher. Periodic volcanic eruptions killed the smaller sea life which sank to the sea bottom and decomposed. When the mineral in the shells and carcasses mixed with sediment, mud balls (or nodules) were formed, then subsequently dried and cracked when the ocean receded. Decomposed shell Calcite worked its way into these cracks, and Calcite crystals were formed. Thin walls of Calcite were transformed into Aragonite, separating Bentonite Clay exteriors from the Calcite center; hence the nodule name, Septaria. Too much info? Well, suffice it to say that simply bringing home this hard-shelled nodule with its "fur-like" crystalline interior is the only requirement needed to guarantee a double-take from every curious looky-loo who is lucky enough to pass through your space! You will both be rock stars! Madagascar.
Dimensions: 4 1/2" x 4 5/8" x 6" tall
Weight: 5.0 lbs.