What material composes the innermost pearly layer of the Volcano Snail shell?
Answer
Aragonite
The structure of the shell is remarkably complex and composed of three distinct layers. While the outer layer is made of iron sulfides and the middle is an organic buffer, the innermost pearly layer is constructed from aragonite, which is a form of calcium carbonate. This multi-layered engineering allows the creature to maintain structural integrity while using materials directly sourced from its extreme habitat.

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