Tag: Marine waste

According to scientific studies, oyster shells are predominantly composed of calcium carbonate, with commercial-grade shells containing an impressive 35-39% elemental calcium. This high percentage makes oyster shells a valuable and sustainable source of calcium for various applications.

The hard, protective shell of a crab, often discarded after enjoying the meat, is far more complex and valuable than most people realize. The crab shell contains a unique composite material of primarily chitin, calcium carbonate, and protein, which has a surprising range of beneficial uses across various industries.