Tag: Calcite

Explore our comprehensive collection of health articles in this category.

What Percentage of Oyster Shells are Calcium?

Dec 25, 2025 •

3 min read

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.

What is 95% of an eggshell made up of?

Dec 24, 2025 •

4 min read

Comprising an astonishing 95% of its dry weight, the primary component of an eggshell is a single, hard mineral, scientifically known as calcium carbonate. This crystalline material is meticulously structured to provide a durable protective barrier for the developing embryo.