Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Category
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2)
Limonite (Ochreous)
FeO(OH)·nH2O (Hydrated Iron Oxide)
Green Aventurine (Tumbled Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Schist
Schist
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt (Mafic volcanic rock)
Rugose Coral (Horn Coral)
Order Rugosa (extinct fossilized coral)
Sandstone (with Liesegang rings or joints)
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)
Slickenside in Limestone
Tectonized Limestone / Calcite (CaCO3)
Sandstone
Arenite
Granite
Phaneritic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
Gneiss (specifically Biotite Gneiss)
Gneiss (high-grade metamorphic rock primarily composed of Silicates)
Schist
Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Phantom Quartz with Chlorite and Hematite inclusions
Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
Sandstone
Arenite (Sedimentary Rock)
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Basalt River Cobble
Basalt (Aphanitic Mafic Volcanic Rock)
Sandstone
Arenite (primarily Quartz, SiO2)
Banded Gneiss
Gneiss (pronounced "nice")
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
Eudialyte in Matrix
Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)
Limonite with Hematite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
Pyromorphite on Epidote
Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]
Gneiss
Gneiss
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
Granite
Phaneritic Plutonic Rock (Granite)
Gneiss
Gneiss
Fossilized Shark Teeth
Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)
Gneiss
Gneiss
Serpentinite (often containing Jadeite/Nephrite)
Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4
Granite
Phaneritic Felsic Igneous Rock