What specific chemical substance creates the metallic reinforcement in the shell of Chrysomallon squamiferum?

Answer

Iron sulfide

The shell structure incorporates iron sulfide, also known as pyrite or fool's gold, to create an exceptionally durable exterior. This biomineralization process allows the snail to survive in the extreme pressure and high concentrations of minerals found near deep-sea hydrothermal vents, providing a defense mechanism far tougher than the typical calcium carbonate structures found in related species.

What specific chemical substance creates the metallic reinforcement in the shell of Chrysomallon squamiferum?
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