1
Q
Granite
A
- Igneous
2
Q
- Basalt
A
- Igneous
3
Q
- Pumice
A
- Igneous
4
Q
- Obsidian
A
- Igneous
looks like shiny, natural glass and often has very sharp edges
5
Q
- Gneiss
A
Metamorphic
6
Q
- Slate
A
Metamorphic
- Much harder and denser than shale; splits into flat, even slabs (slaty cleavage)
- smooth, planar surface that looks more refined—think of roofing tiles or chalkboards.
6
Q
- Quartz
A
Metamorphic
7
Q
- Marble
A
Metamorphic
8
Q
- Mica Schist
A
Metamorphic
9
Q
- Anthracite
A
Sedimentary
looks like shiny coal—it may reflect light but doesn’t have the glassy, smooth appearance of obsidian.
10
Q
- Bituminous
A
Sedimentary
More compact and brittle, may have banding or layering
looks like true coal—darker, harder, and shinier than lignite, often with layered bands.
asphalt
heavier
11
Q
- Lignite
A
Sedimentary
Soft, crumbly, and can break apart easily; has a wood-like structure sometimes
- brown
lighter
12
Q
- Shale
A
Sedimentary
- Soft, crumbly, and fragile; often breaks into thin layers easily with your fingers.
13
Q
- Conglomerate
A
Sedimentary
14
Q
- Limestone
A
Sedimentary
15
Q
- Sandstone
A
Sedimentary
