Yellow Jasper
Silicon Dioxide with iron inclusions (SiO2)
sedimentary
Category
Not A Rock
Browse not a rock specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Riverstone Jasper (Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Banded Rhyolite (likely Green Jasper/Agate variety)
Silicon Dioxide (SiO2) with mineral inclusions
igneous
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt / Oxidized Vesicular Basalt
igneous
Jasper
Silicon Dioxide (SiO2)
sedimentary
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
sedimentary
Banded Calcite (Cave Onyx)
Calcium Carbonate (CaCO3)
sedimentary
Yellow Quartzite Pebble
Quartzite (SiO2)
metamorphic
Jasper with Epidote Vein
Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))
sedimentary
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Quartz (Smoky/Milky Pebble)
Silicon Dioxide (SiO2)
mineral
Apache Tear (Obsidian)
Hydrated volcanic glass (SiO2 with inclusions)
igneous
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
sedimentary
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Basalt
Basalt (Mafic Extrusive)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)
sedimentary
Sandstone (Gneissic or Banded)
Clastic Sedimentary Rock (composed predominantly of SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
River Cobble (likely Sandstone or Siltstone type)
Sandstone or Siltstone (common rock types that form river cobbles)
Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Basalt
Basalt (composition mainly of Plagioclase feldspar, Pyroxene, and Olivine)
igneous
Granite (Weathered)
Plutonic Igneous Rock (Granitic)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Serpentine
Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Quartzite River Rock
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Granite (Phaneritic Igneous Rock)
Granite
igneous
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based with quartz, feldspar, or lithic fragments)
sedimentary
Drill Core Sample
Cylindrical Rock Core (Specific mineralogy varies by extraction site)
Metamorphic (Likely Gneiss or Schist based on texture)
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Snowflake Obsidian (or similar porphyritic volcanic rock)
Obsidian with Spherulites (if glassy), or Porphyritic Rhyolite/Andesite (if crystalline groundmass)
igneous
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Scoria (Basaltic)
Vesicular Basalt
igneous
Pumice
Pumiceous rhyolite
igneous
Granite Sand (Decomposed Granite)
Grus / Quartz-Feldspar Detritus
sedimentary