Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Black Slate

Slate (Metamorphic Rock)

Granite

Intrusive Igneous Rock

Likely water-worn gray pebble

Not identifiable to a specific rock from this image; possibly fine-grained basalt or another dark river-worn rock

Sandstone

Arenite (composed primarily of SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Schist

Mica Schist (primarily composed of quartz, feldspar, and mica)

Granite

Intrusive Phaneritic Felsic Igneous Rock

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Granite

Intrusive Igneous Rock

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock

Banded Gneiss

Gneiss (Metamorphic rock)

Blue-gray quartz-rich rock, possibly blue aventurine or sodalite-bearing stone

Probable quartz–feldspar aggregate; exact identification requires testing

Granite Gneiss

Granitic Gneiss

Granite (Weathered)

Phaneritic Felsic Igneous Rock

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Sandstone

Clastic Sedimentary Rock

Quartz Pebble

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Blue-gray chalcedony (likely agate/jasper fragment)

Microcrystalline quartz, SiO₂ (chalcedony)

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Granite

Intrusive Igneous Rock

Dark slate (probable)

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz; exact identification is uncertain from the photograph.

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Serpentine-rich serpentinite

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible magnetite, brucite, and carbonate

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Red Sandstone (Hematitic)

Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)

Quartzite

Quartzite (principally SiO2)

Banded Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Gneissic Metamorphic Rock

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Unakite

Granitic rock composed of orthoclase, epidote, and quartz

Nuummite

Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite)

Pegmatitic granite

Granite, composed mainly of quartz, feldspar, and mica

Quartz-rich metamorphic pebble, likely quartzite

Quartzite, composed predominantly of quartz (SiO₂)

Weathered quartzite pebble

Quartzite, composed predominantly of quartz (SiO₂)

Banded gneiss pebble

Foliated gneiss, typically quartz–feldspar–mica bearing