Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
Category
Synthetic (Not A Rock Or Mineral)
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
mineral
Ironstone (with possible Hematite/Limonite coating)
Ironstone (Fe-rich sedimentary rock)
sedimentary
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Basalt (with possible Olivine inclusions)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Porphyritic Basalt (with Amygdales)
Amygdaloidal Porphyritic Basalt
igneous
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Chert (Brown variety / Common Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Desert Rose
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Quartz in Matrix (possibly with Biotite or Hornblende)
Quartz (Silicon Dioxide, SiO2) in Granitic Matrix
igneous
Fossilized Shark Tooth in Matrix
Otodus sp. (likely Otodus obliquus)
sedimentary
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartz Mica Schist
Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Diorite (River Pebble)
Diorite (Intermediate intrusive igneous rock)
igneous
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Mica Schist with Iron Staining
Mica Schist
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Metamorphic Rock
Obsidian
Volcanic Glass (SiO2)
igneous
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
igneous
Sandstone (Weathered Cobble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (Cross-bedded Drill Core)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Kimberlite with Diamond
Kimberlite (Porphyritic Peridotite)
igneous
Basalt
Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)
igneous
Vesicular Sandstone
Clastic Sedimentary Rock (Sandstone)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral