Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Category
Mineral (Synthetic)
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
Quartzite and Jasper Pebbles
Quartzite (re-crystallized Quartz) and Cryptocrystalline Quartz (SiO2)
metamorphic
Rough Quartz (Milky Quartz Pebbles)
Silicon Dioxide (SiO2)
mineral
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)
sedimentary (fossil)
Schist
Mica Schist
metamorphic
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Gypsum (Wallboard/Drywall)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Quartz (specifically Milky Quartz/Quartzite)
Silicon Dioxide (SiO2)
Mineral
Copper Ore (with Malachite and Azurite)
Hydroxide copper carbonate (Cu2CO3(OH)2 / Cu3(CO3)2(OH)2)
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Rough Quartz (with Feldspar inclusions)
Silicon Dioxide (SiO2)
Mineral
Granitic Pegmatite
Pegmatitic Granite
igneous
Ironstone Concretion (Limonite/Goethite)
Ironstone (primarily FeO(OH)·nH2O)
sedimentary
Basalt with Calcite Veins
Aphanitic mafic volcanic rock with CaCO3 inclusions
igneous
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Ironstone Concretion (Moqui Marble type)
Ferruginous Concretion (Fe2O3 / FeO(OH))
sedimentary
Sandstone (specifically Lithic or Quartz Arenite)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
sedimentary
Sandstone (Graywacke type)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Turquoise
Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Limonite (Iron Ore)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Red Sandstone Pebble
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 staining)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Mineral
Included Quartz (Garden Quartz / Lodolite)
Quartz (SiO2) with various mineral inclusions
Mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Septarian Nodule
Septarian Concretion
sedimentary
Azurite-Malachite (often called Azerite Malachite or Azurmalachite)
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
Mineral
Chrysocolla in Matrix
Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral