Metamorphic Rock (Composed Of Multiple Minerals)

Nuummite

Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite)

Quartzite Cobble

Quartzite (composed primarily of SiO2)

Quartzite

Quartzite (SiO2 silicon dioxide)

Schist

Mica Schist (Metamorphic rock)

Red Sandstone

Arenite (Ferruginous Sandstone)

Greenschist / Serpentinite Cobble

Greenschist (composed primarily of chlorite, actinolite, and epidote)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Cowrie shell

Marine gastropod shell; likely a cowrie (family Cypraeidae), species not identifiable from the image

Sandstone

Arenite (primarily SiO2)

Mixed stream gravel and cobbles

Polylithic alluvial deposit; individual clasts are not identifiable at this resolution

Granite

Intrusive Igneous Rock

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)

Sandstone or possibly a conglomerate

Arenite (if sandstone)

Pebble (likely Quartzite or Chert)

Clastic Sediment, potentially composed of SiO₂ (Quartz)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks

Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxidized

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

Granite

Felsic Intrusive Igneous Rock

Granite

Granite (plutonic igneous rock)

Quartzite Pebble

Metamorphic rock primarily composed of Silicon Dioxide (SiO2)

Asphalt Pavement (with aggregate)

Asphalt concrete

Iron-rich breccia or weathered limonite-bearing rock

Goethite–limonite ironstone, possibly ferruginous breccia

Greenstone (likely chlorite-rich greenschist)

Greenschist facies metamorphic rock, typically composed of chlorite, actinolite, and albite; exact identification requires testing

Dark fine-grained rock fragment

Likely basalt or basaltic scoria; exact identification requires testing

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Weathered fossiliferous limestone fragment, possibly fossil coral or shell material

Indeterminate carbonate fossil in calcitic limestone; likely composed mainly of calcite (CaCO₃), but species identification is not possible from this image alone

Chlorite-rich metamorphic rock, likely greenschist

Greenschist; commonly composed of chlorite, actinolite, epidote, albite, and quartz

Greenstone

Greenschist (composed of actinolite, chlorite, and epidote)

Quartzite pebble

Quartzite, composed predominantly of quartz (SiO₂)

Lapis Lazuli

Rock composed mainly of lazurite, calcite, and pyrite

Banded Gneiss

Gneiss (Metamorphic Rock)

Sandstone

Arenite (SiO2 based with various mineral cements)

Quartz-Veined Slate or Greenstone

Metamorphic rock with quartz vein (SiO2)

Fossil oyster shell

Fossilized bivalve, likely Ostrea or Crassostrea; calcite (CaCO₃) shell

Likely gabbro or dark amphibolite

Gabbro: coarse-grained mafic rock composed mainly of plagioclase and pyroxene; possible amphibolite: hornblende and plagioclase

Schist

Mica Schist

Schist (likely Mica Schist)

Mica Schist

Granite

Granite (Felsic Plutonic Rock)

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Quartz-bearing granite or pegmatite fragment

Likely granitic material composed mainly of quartz (SiO₂), feldspar, and possibly biotite or hornblende