"The Mystery of Lyle and Louise"

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Gray to brown mudstone with abundant silt.

Fightly cemented, medium-to-coarse quartz grains.

Massive, chlorite-rich.

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

A sawn and lacquered slab of classic Precambrian banded layers of hematite (iron) and quartz. Average size: 3" x 4". Ontario, Canada.

Sale

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

Gray, fine-grained, massive contact rock.

Gray to buff, with numerous ooliths and fossil fragments.

Foliated biotite, coarse, silvery gray with quartz-feldspar bands.