Granodiorite with Biotite Mica
Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite Mica)
igneous
Category
Not A Rock
Browse not a rock specimens identified by the Rock Identifier community.
Lapis Lazuli
Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
Metamorphic rock
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Unakite
Epidotized Granite
metamorphic
Crushed Stone (Basalt/Gabbro)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Green Quartzite
Quartzite (primarily SiO2 with chlorite inclusions)
metamorphic
Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
sedimentary
Fossil Bivalve Shell
Class Bivalvia (e.g., Veneriidae family)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Basalt with Quartz Veins
Basalt (complex silicate) with Quartz (SiO2) intrusions
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Druzy on Basalt
Silicon Dioxide (SiO2) on Mafic Volcanic Rock
Mineral on Igneous Rock
Druzy Quartz Geode (Vug)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary Rock
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic
Basalt with Quartz/Calcite Veins
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt (Concrete Aggregate)
Basalt (Mafic volcanic rock)
igneous
Granitic Pegmatite
Pegmatitic Granite
igneous
Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Mineral on Igneous Rock
Unakite
Unakite (Altered Granite composed of Orthoclase KAlSi3O8, Epidote Ca2(Al, Fe)3(SiO4)3(OH), and Quartz SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Granite River Rock
Phaneritic Felsic Igneous Rock (Granite)
igneous
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Diamond (in Matrix)
Carbon (C)
mineral
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
metamorphic
Goethite
Goethite (FeO(OH))
mineral
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
sedimentary
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
mineral
Unakite
Unakite (altered granitic rock)
metamorphic
Unakite
Epidotized Granite
metamorphic
Unable to identify - Image contains non-geological items
N/A
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Shale
Lutaceous Sedimentary Rock
sedimentary
Sandstone (Graywacke)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Black Mountain Stone (Seiryu Stone)
Limestone with Calcite veins (CaCO3)
sedimentary
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic