Description Calcite Powder Calcite Powder or Limestone is a common sedimentary rock composed primarily of the calcium carbonate mineral, calcite (CaCO3). Calcite Powder constitutes approximately 10 percent of the sedimentary rocks exposed on the earth's surface. Calcite Powder is formed either by direct crystallization from water (usually seawater) or by the accumulation of sea animal shells and shell fragments. Features: Higher mechanical properties in thermoplastic applications Higher flow properties Prevents chalking Gloss and whiteness in paints and powder coating applications Excellent dispersion properties