Schist
Schist (metamorphic rock)
metamorphic
Category
Mineral, Part Of A Rock
Browse mineral, part of a rock specimens identified by the Rock Identifier community.
Learn about Mineral, Part Of A Rock in the encyclopedia
View all →
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Porphyritic Igneous Rock / Basalt or Andesite Xenolith in Granite or Quartzite
Silicate rock with contrasting xenolith/inclusion
igneous
K-Feldspar / Granite Pegmatite
Potassium Feldspar (Microcline/Orthoclase) with Quartz
igneous
Granite with Epidote / Unakite precursor
Plutonic igneous rock composed of Quartz, Feldspar, and Epidote/Chlorite
igneous
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Chalcopyrite in Gossan
Chalcopyrite (CuFeS2) in a Limonite-rich Gossan matrix
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Intrusive Felsic Igneous Rock
igneous
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Granite
Intrusive Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock (Felsic)
igneous
River Cobble with Algae Patina
Weathered Chert or Quartzite pebble (SiO2 dominated)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Weathered river cobble, possibly sandstone or volcanic tuff
Indeterminate lithology; likely fine-grained sandstone/siltstone, with possible iron-oxide veining
sedimentary
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Hagstone (Adder Stone)
Chert or Sedimentary pebble with natural perforation
sedimentary
Granite
Phaneritic Plutonic Felsic Rock
igneous
Rounded river pebble, likely quartz-rich sandstone or fine-grained granite
Indeterminate from photograph; possible quartz/feldspar-bearing granitic pebble
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Basalt Breccia
Volcanic Breccia (composed of basaltic clasts in a fine-grained matrix)
igneous
Agate Geode Slice (with Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Quartz (Milky or Smoky Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Phaneritic igneous rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Tumbled quartz pebble, likely iron-stained quartz
Quartz (silicon dioxide, SiO₂), possibly milky quartz with limonite/goethite staining
mineral
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Gabbro (or Basalt Pebble)
Mafic Intrusive/Extrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Sandstone (River Cobble)
Clastic Sedimentary Rock (primarily Quartz with Feldspar)
sedimentary
Peridotite (with Olivine)
Peridotite (dominantly (Mg, Fe)2SiO4)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Biological Bone (Patella/Knee)
Patella (part of the Human Skeletal System)
Organic Structure (Not a Rock)
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic