What is Limestone?
Limestone is a sedimentary rock formed primarily from aquatic deposits. It contains varying amounts of silica and is typically white in color. However, its appearance often changes due to the presence of impurities that cause discoloration.
Characteristics and Properties of Limestone
Limestone has several distinctive features, including:
- It is formed from the accumulation and deposition of marine animal remains.
- Used in the extraction of iron.
- Considered a key component in the production of cement.
- Widely used in construction and decorative applications.
- An important source of lime.
- Also used in the production of rock wool.
Types of Limestone
Limestone comes in several varieties, including:
- Hydraulic Limestone: Also known as “quick limestone” this type is produced by burning limestone that lacks calcium carbonate. It is mainly used with water.
- Organic Limestone: This type contains skeletal fragments of marine animals such as shells and bones.
- Chemical Limestone: Formed by the precipitation of calcium carbonate due to exposure to varying temperatures. Common forms include stalactites and stalagmites, which develop in cone-like shapes.
Physical Properties and Chemical Composition of Limestone
- Color: Typically white.
- Streak: The streak is usually the same as its natural color (white).
- Luster: Has a glassy luster.
- Porosity: Low porosity.
- Water Absorption: Low capacity for water absorption.
