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This specimen features sharp
The fibrous crystals with translucent radial fractures or globular clusters range from pale green to emerald green in color
This item is 5” x 3” and weighs 51
the rosettes erode into positive relief on exposed rock surfaces
a family of silicate minerals with the chemical formula X₃Y₂(SiO₄)₃ that crystallize in the isometric system
Rudist Bivalve Fossil | Saudi Arabia | Late Cretaceous ammolite This specimen features sharpRudist bivalves are an extinct marine mollusk that operated as major reef builders in the Late Cretaceous. Their shell structure was heteromorphic, they often possessed a thick, calcitic attached valve and a smaller free upper valve. While rudists themselves are known for their strange and varied shapes, some groups within this subclass exhibit homeomorphic evolution, where unrelated species evolved similar, often parallel forms. This item is 5 x 4
