Sea Urchin - Pyritized Fossil Size:Large Description: This is a marine

Description: This is a marine bivalve mollusk from Texas

Approximate Size for 1 piece: 80mm x 80mm x 15mm

Chemical Composition: CO4

while maintaining the original crystal shape

leaving behind layered crystalline deposits

Sea Urchin - Pyritized Fossil Size:Large Description: This is a marineMined from: Island of Rugen, Hver, near Hannover, Germany Era: Mesozoic Geological Age: Approximately 70 mya Description: This fossil sea urchin comes from the Upper Cretaceous deposits of the Hver Quarry near Hannover, Germany, and the Island of Rgen, dating back approximately 70 million years. While the original shell remains mostly preserved, small patches of pyrite are scattered around and within the fossil, adding subtle metallic highlights