Characteristics of Limestone:

Rock Type: Marine, chemical, sedimentary

Fossils: Marine and freshwater invertebrates

Major Minerals: Calcite

Minor Minerals: Aragonite, dolomite, siderite, quartz, pyrite

Colors: White, grey, pink

Texture: Fine to medium, angular to rounded

Locations: Worldwide

What is Limestone? 

Limestone is largely made up of calcium carbonate and, depending on its formation, can be clastic, crystalline, granular, or massive. A sedimentary rock, most Limestone forms in calm marine waters, occurring when marine organisms dies and fragments of shell, skeletal debris, and coral break down into sediment. Minerals then cement the sediment together, turning it into Limestone. It was used in many ancient carvings, and is regularly employed as a construction material, a base for roads, a white pigment or a filler in paints, plastics, and toothpaste.