1. Granite:
- Granite is an intrusive igneous rock.
- It forms when molten magma slowly cools and solidifies beneath the Earth's surface.
- It has a coarse-grained texture with visible mineral crystals, mainly composed of quartz, feldspar and mica.
- Granite is typically hard, strong, and resistant to weathering.
2. Pumice:
- Pumice is an extrusive igneous rock.
- It forms when highly viscous (thick) and gas-rich magma erupts onto the Earth's surface.
- Rapid cooling and expansion of gases cause the magma to solidify into a lightweight, porous rock with a frothy or spongy texture.
- Pumice is typically light-colored, ranging from white to gray.
3. Marble:
- Marble is a metamorphic rock.
- It forms when sedimentary rocks, composed mainly of calcium carbonate (limestone) or dolomite, undergo intense heat and pressure within the Earth's crust.
- The recrystallization process results in a compact, non-foliated rock with a crystalline texture.
- Marble is often characterized by its distinctive veining and swirling patterns, which are formed by different mineral impurities.
- Marble is typically used for decorative purposes, such as sculptures, tiles, and countertops, due to its attractive appearance and durability.