Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
igneous
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
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Sandstone Pebble
Sedimentary quartz arenite
sedimentary
Pink Granite
Phaneritic Plutonic Rock (Felsic)
igneous
Sandstone Pebble
Quartz Sandstone
sedimentary
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite with Hematite staining
Quartzite (SiO2) with iron oxide inclusions
metamorphic
Granite
Intrusive Igneous Rock
igneous
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Biotite gneiss (probable)
Foliated gneiss composed mainly of quartz, feldspar, and biotite mica
metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock (complex silicate)
metamorphic
Fossil oyster shell
Fossilized bivalve, likely Ostrea or Crassostrea; calcite (CaCO₃) shell
fossil
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Green Quartzite (with Fuchsite)
Quartzite with Muscovite variety Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Greenstone
Metabasalt (Greenstone)
metamorphic
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Schist
Metamorphic Rock (Schist)
metamorphic
Gneiss (with Quartzite layers)
Gneissic Metamorphic Rock
metamorphic
Schist
Schist (various mineral compositions)
metamorphic
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
igneous
Red Sandstone (Hematitic)
Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone
Clastic sedimentary rock
sedimentary
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Pebble or Cobble (likely composed of sandstone or conglomerate)
Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)
Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)
Slate
Slate (Metamorphic Rock)
metamorphic
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Slate River Stone
Foliated Metamorphic Rock (composed of illite, chlorite, and quartz)
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Conglomerate
Conglomeratic Sandstone
sedimentary
Quartz Vein in Greenstone
Metamorphic rock with quartz vein (SiO2 / mixed silicates)
metamorphic
Ironstone Concretion (Moqui Marble)
Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone (Epidote/Chlorite Rich Rock)
Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
metamorphic
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Sandstone
Clastic Sedimentary Rock
sedimentary
Pink Granite
Phaneritic intrusive igneous rock with dominant Alkali Feldspar
igneous
Sandstone Pebble
Sandstone (Quartzose/Feldspathic Sandstone)
sedimentary