Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Blue Lace Agate
Chalcedony (a form of Quartz) - SiO2
Mineral
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Iron Ore / Ironstone Concretion
Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.
Mineral, specifically an iron ore
Shale
Shale (clastic sedimentary rock)
Sedimentary
Pumice
Pumice (a highly vesicular volcanic glass)
igneous
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Sodalite (blue beads) and Clear Quartz (clear beads)
Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Satin Spar (Gypsum)
Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
sedimentary
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Banded Sandstone
Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)
sedimentary
Sandstone
Arenite
sedimentary
Chert (and Chalcedony/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Gneiss (Pebble)
Gneiss
metamorphic
Ruby in Fuchsite
Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)
Mineral
Black Jasper (Black Stone / River Pebble)
Silicon Dioxide (SiO₂), Opaque variety of Chalcedony
sedimentary
Granodiorite
Granodiorite (Quartz-Feldspar-Biotite Plutonic Rock)
igneous
Quartzite pebble
Quartzite (SiO2 dominated)
metamorphic
Agate Geode with Quartz Druzy
Chalcedony (SiO2) and Quartz (SiO2)
mineral
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
River Quartzite (or Quartz Cobble)
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Granite (weathered pebble)
Granite (plutonic igneous rock)
Igneous
Sandstone
Arenite
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Mineral (variety of Chalcedony/Quartz)
Schist
Schist
metamorphic
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary