"gel box"

Altered Igneous and Sedimentary Rocks are Clearly Represented

Massive, chlorite-rich.

Fightly cemented, medium-to-coarse quartz grains.

Chlorite-mica with perfect slaty cleavage.

Gray to white, coarse crystalline, carbonate rock.

Pink/gray coarse carbonate rock.

White and black bands of quartz, feldspar, and biotite; typical foliation.

Gray, fine-grained, massive contact rock.

Pink and gray bands, with biotite; shows good foliation.

Chlorite-bearing.

Fine crystalline, pure calcite.

Dark-green 'verde antique', containing some chlorite and calcite.

Light gray, fine-grained, well-foliated, schistose.

Lustrous, black 'hard coal'.

Slaty cleavage; contains hematite.

Perfect for Introductory Lessons on Metamorphic Rocks.