Rock

3. This lightweight rock is formed from volcanic ash and has a rough texture. It is often used as an abrasive in cleaning.
6. This dark-colored rock is formed from volcanic lava and is commonly found in areas with volcanic activity.
7. This rock is formed from shale and is easily split into flat sheets. It is often used as a roofing material or for writing on.
9. This rock is made up of compressed layers of clay and silt. It easily breaks into thin sheets and can contain fossils.
12. This rock is very hard and often used as a decorative stone. It has a sparkly appearance and is made mostly of quartz.
13. This metamorphic rock has distinct banding and is formed from other rocks through intense heat and pressure.
14. This soft, white rock is made up of tiny marine organisms. It is often used in writing and drawing.

1. This rock is made up of sand-sized grains and is often used in building materials. It can have different colors and textures.
2. This rock is known for its speckled appearance and is often used in construction. It is very hard and durable.
4. This rock is smooth and often used in sculptures and architecture. It can be polished to a shiny finish and comes in many colors.
5. This molten rock is expelled during volcanic eruptions and solidifies to form igneous rock.
8. This rock is formed from ancient shells and is often found in caves. It fizzes when exposed to acid like vinegar.
9. This metamorphic rock has a layered appearance and is often used for decorative purposes.
10. This volcanic glass is formed when lava cools quickly. It is shiny and can have sharp edges, making it useful for tools.
11. Lazuli This blue-colored rock is prized for its use in jewelry and art. It contains minerals like lazurite and pyrite.