Limestone:
* Formation: Formed primarily from the accumulation of marine organism remains, particularly shells and coral.
* Texture: Typically has a granular or crystalline texture, sometimes with visible fossils. It can range from fine-grained to coarse-grained.
* Weight: Relatively light. Density varies depending on the type of limestone, but generally lighter than marble.
Marble:
* Formation: Formed from metamorphosed limestone. Heat and pressure recrystallize the calcium carbonate in limestone, changing its structure and appearance.
* Texture: Characterized by a distinctive, often swirling or veined pattern due to the recrystallization process. Can be fine-grained, medium-grained, or coarse-grained.
* Weight: Denser and heavier than limestone due to the metamorphic process.
Key Differences in Texture and Weight:
* Texture: Limestone is often more granular and less visually striking than marble. Marble's metamorphic origin gives it a unique, often intricate pattern.
* Weight: Marble's density and weight are higher than limestone because the metamorphic process compacts the material.
In summary: While both limestone and marble are composed primarily of calcium carbonate, the metamorphic process that transforms limestone into marble significantly alters its texture and weight.
