Clear Quartz (Rock Crystal) Bead
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Jasper with Iron Staining
Silicon Dioxide (SiO2) with impurities
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Bituminous Coal
Organic sedimentary rock (humic coal)
sedimentary
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Weathered Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Black Opal (Kalimaya)
Hydrated Silica (SiO2·nH2O)
mineraloid
Hematite
Iron(III) oxide (Fe2O3)
mineral
Travertine
Calcium Carbonate (CaCO3)
sedimentary
Tumbled red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Gold (Processed)
Gold (Au)
Metal (Elemental Mineral)
Iron-rich concretion or slag-like rock
Goethite–hematite limonite concretion, possibly iron slag
sedimentary
Sandstone
Arenite
sedimentary
Likely tumbled pale-green mineral specimen
Indeterminate; possibly serpentine, calcite, or pale jade/nephrite
mineral
Hematite (Iron Ore Boulder)
Hematite (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Hematite cameo or hematine imitation
Hematite (Fe₂O₃); possibly synthetic hematine or black glass
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Hematite
Hematite (Fe2O3)
Mineral
Iron-oxide-stained sulfide-bearing rock, possibly pyrite-bearing schist
Likely quartz–mica schist or massive sulfide rock with pyrite (FeS₂) and limonite/goethite (FeO(OH)·nH₂O)
metamorphic
Sandstone (likely Fossiliferous Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Red Quartzite
Quartzite (primarily SiO2 with hematite impurities)
metamorphic
Blue Sapphire and Diamond (Set in Metal)
Corundum (Al2O3) and Diamond (C)
mineral
Pebble (likely Quartzite or Chert)
Clastic Sediment, potentially composed of SiO₂ (Quartz)
Mineral, Sediment
Banded Agate Coaster
Silicon Dioxide (SiO2) - Variety Agate / Chalcedony
mineral
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
igneous
Asphalt aggregate pavement
Bituminous asphalt concrete containing crushed stone aggregate
sedimentary
Hematite
Hematite (Fe2O3)
mineral
Hematite
Hematite (Fe2O3)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Iron-rich breccia or weathered ironstone
Goethite–hematite-bearing ferruginous rock, possibly limonite
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
sedimentary
Epidote
Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))
metamorphic