Identify any rockfrom a photo.

Vesicular basalt (likely scoria)

Vesicular basalt; chiefly plagioclase, pyroxene, olivine, and iron oxides

Tumbled hematite-rich jasper

Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite (Fe₂O₃)

Weathered granite (likely biotite granite)

Granite; interlocking quartz, feldspar, and mica, commonly with biotite

Iron-rich quartzite or ferruginous metamorphic rock

Quartzite, predominantly SiO₂, stained by iron oxides (hematite/goethite)

Mica-rich metamorphic rock, likely schist

Biotite–muscovite schist, possibly garnet-bearing

Weathered basalt or other dark volcanic rock

Likely basalt; predominantly plagioclase feldspar and pyroxene, possibly olivine and iron oxides

Dark fine-grained rock, likely basalt

Basalt; chiefly plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Smoky quartz

Quartz, silicon dioxide (SiO₂), brown to gray variety

Quartz-rich metamorphic rock, likely mica schist

Mica schist; chiefly quartz (SiO₂) with biotite/muscovite mica and possible feldspar

Bornite (peacock ore), likely with chalcopyrite

Bornite, Cu5FeS4; associated copper sulfides may include chalcopyrite, CuFeS2

Weathered iron-rich rock, likely limonite/goethite-bearing laterite

Limonite–goethite aggregate, commonly approximated as hydrated iron oxides (FeO(OH)·nH₂O)

Weathered brown mineralized rock

Likely iron-stained quartzite or quartz-rich metamorphic rock; exact identification requires testing