Weathered schist or gneiss cobble

Gray-brown, strongly foliated and folded, with reflective mica-rich layers and darker bands. Typical hardness is about 5–6 Mohs; uneven fracture, weak-to-moderate foliation, and a dull to subtly silky luster. Exact mineral composition cannot be confirmed from the photograph, but quartz, feldspar, and biotite/muscovite are likely.

Formed when pre-existing sedimentary or igneous rock underwent regional metamorphism, typically during mountain building. The specimen is likely Paleozoic or Precambrian in age, consistent with metamorphic rocks common around the Québec City region.

Used locally as decorative stone, landscaping material, and aggregate; attractive pieces may be kept as geological specimens. It is generally not gem-grade or high-value.

The curving bands and apparent mineral alignment indicate ductile deformation under heat and pressure. Its rounded shape likely results from glacial transport or stream abrasion rather than its original formation.

Commonly found in glacial deposits and bedrock exposures near 46.9°N, 71.2°W. Look for aligned mica flakes, compositional banding, and layers that split preferentially; a streak or hardness test can help distinguish it from darker sedimentary rocks. A precise identification requires a fresh surface or thin section.