Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
Basalt with Scoria/Vesicular texture
Vesicular Basalt (primarily Plagioclase feldspar, Pyroxene, and Olivine)
Granite
Phaneritic Felsic Intrusive Igneous Rock
Milky Quartz
Silicon Dioxide (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Amethyst (Tumbled)
Amethyst (Silicon Dioxide, SiO2 + Fe4+)
Sandstone Concretion
Ferruginous Sandstone Concretion
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Amygdaloidal Basalt
Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)
Red Quartzite
Quartzite (primarily SiO2)
Chert (specifically Pink/Tan Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
Ammonite Fossil
Ammonoidea (subclass)
Milky Quartz
Silicon Dioxide (SiO2)
Chert Nodule
Microcrystalline Silica (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Amygdaloidal Basalt with Quartz/Calcite Inclusions
Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)
Ruby in Zoisite (Anyolite)
Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))
Sandstone Concretion
Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)
Basalt
Mafic Volcanic Rock (Primarily Plagioclase feldspar and Pyroxene)
Slate
Slate (Foliated Metamorphic Rock)
Gabbro
Gabbro (Mafic Plutonic Rock)
Granite
Phaneritic Plutonic Felsic Rock
Pink Granite
Granite (Phaneritic igneous rock)
Granite
Granite (Felsic Plutonic Rock)
Mica Schist
Foliated Metamorphic Rock (Schist)
Conglomerate
Conglomerate (clastic sedimentary rock)
Granite
Granite (Phaneritic Igneous Rock)
Phyllite
Phyllite (Foliated metamorphic rock)
Granite
Phaneritic Felsic Igneous Rock
Basalt
Basalt (Mafic volcanic rock)
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
Diorite
Diorite (Intermediate Plutonic Rock)
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
Conglomerate
Clastic sedimentary rock (Puddingstone)
Greenstone
Metamorphosed Mafic Igneous Rock
Conglomerate
Clastic sedimentary rock (Conglomerate)
Conglomerate with Quartzite Pebbles
Clastic sedimentary rock (Conglomerate)