Red Sandstone
Sedimentary Quartz Arenite / Arkose
sedimentary
Category
Synthetic (Not A Rock Or Mineral)
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
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Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Banded Sandstone
Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)
sedimentary
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Tumbled/River Pebble)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone (Iron-stained)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Basalt with Quartz/Calcite Veins
Basalt with hydrothermal vein infill
igneous
Slickenside
Tectonic Fault Scarp Surface
metamorphic
Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)
Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein
sedimentary
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Granite Pebble with Quartz Vein
Granite (Plutonic Igneous Rock) with Quartz (SiO2)
igneous
Quartz Geode
Silicon Dioxide (SiO2) in Geodic habit
mineral
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Granite Gneiss
Granitic Gneiss
Metamorphic
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Likely weathered gneiss
Foliated metamorphic rock, commonly quartz–feldspar–mica gneiss
metamorphic
Schist
Schist
Metamorphic
Granite
Granite
Igneous
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
sedimentary
River Pebble (Siltstone / Fine-grained Sandstone)
Sedimentary Pebble (Siliclastic)
sedimentary
Orange Quartz (or Carnelian Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
mineral
Quartz Druzy Geode
Silicon Dioxide (SiO2) - Crystalline Variety
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Veined Grey Metamorphic Pebble
Quartzo-feldspathic vein in Metabasalt / Serpentinite / Slate
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Basalt with Quartz/Calcite Veining
Basalt (principally Plagioclase and Pyroxene)
igneous
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Dalmation Jasper (or Dalmation Stone)
Dalmation Stone (composed of Perthite, Quartz, and Arfvedsonite)
igneous
Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Sandstone Pebble with Mineral Encrustation
Quartz Sandstone with Calcite/Halite Crust
sedimentary
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral