Fossil Coral Sphere - Fossil Sphere in Madreporic Coral –...

Fossil Sphere in Madreporic Coral – Madagascar — An object that holds millions of years of history: this polished sphere comes from a rare fossil deposit of Madreporic coral in Madagascar, transformed into natural stone through a long slow process in which time has replaced organic matter with minerals. The result is a fascinating interweaving of concentric, ovoid, and cavernous structures that tell the story of ancient colonial organisms that lived in seas now vanished. The warm, earthy tone, with shades ranging from honey to golden brown, gives this sphere a strong decorative presence, making it perfect for both a collection and environments inspired by nature and deep time. Commercial name: Fossil Coral of Madagascar Geological age: Lower Cretaceous (about 140–100 million years ago) Provenance: Western Madagascar Texture: Fossilization by silicification or secondary calcification The ancient colonial corals lived in tropical marine environments, forming coral reefs. After their death, their calcareous skeletons were covered by marine sediments. Over time, diagenetic and mineralization processes progressively replaced the original structure with calcite, aragonite, or, in some cases, microcrystalline quartz. The result is a fossil rock with the skeletal structures still recognizable.

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