Sedimentary Rock (Metamorphosed)

Graphite-rich schist (likely graphite ore)

Graphite-bearing schist; predominantly graphitic carbon (C) with mica, quartz, and possible feldspar

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Iron-rich quartzite or ferruginous metamorphic rock

Ferruginous quartzite, likely hematite/goethite-bearing quartzite; SiO₂ with Fe₂O₃/FeO(OH)

Tumbled gray quartzite or chert pebble

Quartzite (microcrystalline SiO₂; possibly chert)

River Pebbles (Chert and Quartzite)

Sedimentary Clastic Rock (Silica-rich)

Marble

Metamorphosed Limestone/Dolomite

Likely weathered sandstone or iron-stained quartzite fragment

Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)

Marble

Recrystallized Calcite (CaCO3)

Epidote–garnet schist (probable)

Epidote + garnet + quartz/feldspar mica schist; garnet may be almandine–grossular series

Banded calcite (likely marble or calcite-rich limestone)

Calcite, CaCO₃; possibly calcitic marble

Tumbled brown mineral pebble, possibly jasper or weathered quartzite

Indeterminate from the blurred image; likely microcrystalline quartz (SiO₂) if jasper, or quartzite dominated by quartz

Likely quartz-rich metamorphic rock (quartzite or quartz-veined schist)

Quartzite/siliceous schist; chiefly quartz (SiO₂), with probable mica and iron-oxide staining

River Stone (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) based metamorphosed sandstone

Pyrite-bearing metamorphic rock (probable pyrite schist or sulfide ore)

Pyrite (FeS₂) in a foliated, quartz–mica-rich host rock; exact identification requires testing

Picasso Jasper (Picasso Stone)

Metamorphosed Calcium Carbonate (Silicified Limestone)

Quartzite with Quartz Vein

Metamorphosed Quartz-rich Sandstone (SiO2)

Iron-rich quartzite or weathered ironstone

Quartzite, predominantly SiO₂, with limonite/goethite (FeO(OH)·nH₂O) staining

Greenstone / Metagraywacke

Metamorphosed basaltic or sedimentary rock (Complex Silicate)

Weathered quartz-rich rock, possibly quartzite or iron-stained quartz

Quartzite (mostly SiO₂), with possible iron-oxide staining and minor feldspar/mica

Quartzite with Iron Inclusions

Metamorphosed Quartz Arenite (SiO2)

Weathered gray metamorphic rock, likely slate or phyllite

Foliated metapelite; composition commonly quartz, mica, and chlorite

Weathered granite or granitic gneiss

Granite; chiefly quartz, feldspar, and biotite/hornblende

Weathered quartz-rich pebble

Quartzite or silicified sandstone; predominantly microcrystalline quartz (SiO₂)

Puddingstone

Conglomerate (Gowganda Formation)

Shale (or Slate / Coal / Jet)

Laminated fine-grained sedimentary rock (predominantly clay minerals)

Rounded gray-brown cobble, likely weathered sandstone or quartzite

Tentatively quartz-rich sandstone (SiO₂-dominated); exact identification requires hardness and acid tests

Weathered sandstone or quartzite cobble

Quartz-rich sandstone; possibly weakly metamorphosed quartzite (SiO₂-dominant)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Rounded river pebble, likely quartz-rich sandstone or fine-grained quartzite

Indeterminate quartz-rich lithic clast; likely quartz sandstone (SiO₂-rich) or quartzite

Pyrite-bearing metamorphic rock (likely schist or gneiss)

Pyrite (FeS₂) in a quartz–mica-rich host rock

Dark metamorphic rock, likely schist or phyllite

Quartz–mica schist/phyllite; chiefly quartz, mica, and feldspar

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, possibly granitic gneiss

Quartz-rich metamorphic rock, likely mica schist

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

Iron-rich quartzite or ironstone fragment

Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite

Possible shale or slate fragment

Fine-grained clay-rich rock; possibly slate (low-grade metamorphosed shale)

Weathered river pebble, likely quartz-rich sandstone or iron-stained quartzite

Provisional identification: quartz-rich sandstone/quartzite; exact composition cannot be confirmed from the image

Greenstone (Prase / Metavolcanic)

Metamorphosed volcanic rock (Greenstone)

Graphite-bearing metamorphic rock (probable graphite schist)

Graphite schist; predominantly quartz–mica–graphite, with possible feldspar and sulfide minerals

Rounded quartz-veined pebble

Likely quartz-veined metamorphic rock; exact host rock is indeterminate from the image

Greenstone

Metabasalt / Metamorphosed Igneous Rock

Dark gray foliated metamorphic rock, likely slate or phyllite

Slate/phyllite; chiefly quartz, mica, and chlorite

Granite or granitic gneiss pebble

Quartz–feldspar–mica aggregate; likely granite, possibly foliated gneiss