Biorock Structure
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Mineral NameBiorock Structure
Chemical FormulaCaCO3 (aragonite) and Mg(OH)2 (brucite)
Mohs Hardness3
Streak ColorWhite
CleavageNot applicable to the composite structure
FractureUneven to earthy
Specific Gravity2.5
Colorswhite, off-white, pale yellow
TransparencyOpaque
Type LocalityVarious marine environments globally where deployed
Mineral GroupCarbonates, Hydroxides
Usescoral reef restoration, coastal protection, aquaculture
Associated Mineralsaragonite, brucite
Description
A porous, white to off-white mineral accretion forming a crust on a submerged metal structure, often seen with gas bubbles adhering to its surface.
Geological Context
An artificial structure formed by electro-chemical mineral accretion in seawater, where a low-voltage current causes calcium carbonate and magnesium hydroxide to precipitate onto a cathode.
