Vesicular Basalt (Pumice-like)
Vesicular Basalt
igneous
Category
Not A Rock (Man Made Polymer)
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Agate (specifically, multi-colored or pastel-dyed agate)
Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).
Mineral
Granodiorite (Gneissic texture)
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Basalt (Vesicular)
Basalt (Extrusive Volcanic Rock)
igneous
Basalt with inclusion
Basalt (Aphanitic-Porphyritic texture)
igneous
Basalt with Scoria
Amygdaloidal Basalt / Vesicular Basalt
igneous
Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt Cobble
Aphanitic Mafic Igneous Rock (Basalt)
igneous
Shale
Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Quartz Sandstone (predominantly)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt
Basalt (Mafic Extrusive)
igneous
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
sedimentary
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite (SiO2 dominant)
sedimentary
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral (man-enhanced)
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Basalt
Extrusive mafic igneous rock
igneous
Chert (Jasper/Flint Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Basalt
Vesicular Basalt
igneous
Basalt
Basalt (composition predominately Plagioclase feldspar and Pyroxene)
igneous
Basalt with Vesicles
Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Serpentine (Serpentinite)
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic