Arsenic (Native)
Arsenic (As)
Category
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Arsenic (Native)
Arsenic (As)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Labradorite
Labradorite (Plagioclase Feldspar series; (Ca,Na)(Al,Si)4O8)
Pyrite
Iron Sulfide (FeS2)
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
Labradorite
Labradorite (Plagioclase Feldspar Series: (Ca,Na)(Al,Si)4O8)
Pyrite on Quartz (Fool's Gold in Quartz)
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8
Sunstone
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
Gold Nugget
Native Gold (Au)
Green Aventurine
Aventurine Quartz (SiO2)
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Sunstone
Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)
Red Aventurine
SiO2 (Silicon Dioxide with Hematite/Goethite inclusions)
Muscovite Mica (likely on Quartz/Feldspar)
Muscovite - KAl2(AlSi3O10)(OH)2
Mica
Phyllosilicate (group name), typically Muscovite KAl2(AlSi3O10)(OH)2 or Biotite K(Mg,Fe)3(AlSi3O10)(OH)2
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Jadeite (Jade Ring)
NaAlSi2O6 (Sodium Aluminum Silicate)
Lapis Lazuli
Lapis Lazuli (Rock containing lazurite, calcite, and pyrite)
Ferruginous Sandstone
Arenite with limonite/goethite cement
Banded Iron Formation (BIF)
Banded Iron Formation (Fe2O3 + SiO2)
Likely metallic sulfide mineral fragment
Possibly galena (PbS) or pyrite (FeS₂); identification is uncertain from the photograph
Copper Composite Turquoise (Purple and Blue)
Composite Hydrous copper aluminum phosphate with bronze/copper matrix binding
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
Schist
Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)
Pyritic Sandstone
Clastic Sedimentary Rock (Pyrite-bearing Sandstone)
Tumbled blue stone, likely sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue calcite or dyed material
Blue sodalite-bearing rock, likely sodalite in nepheline syenite
Sodalite (Na₈Al₆Si₆O₂₄Cl₂), possibly in nepheline syenite
Iron-rich hematite/goethite concretion (likely limonite)
Hematite (Fe₂O₃) with goethite (FeO(OH)) and limonite
Hematite
Iron(III) oxide (Fe2O3)
Tumbled blue sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
Small dark mineral/rock fragment
Indeterminate; possibly magnetite-bearing basalt or iron-rich slag
Lepidolite with Tourmaline in Quartz Matrix
K(Li,Al)3(Si,Al)4O10(F,OH)2 (Lepidolite) / SiO2 (Quartz)
Magnetite / Hematite (Iron Ore Pebble)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
Sunstone (Oregon Sunstone)
Labradorite (Feldspar variety) - (Ca, Na)(Al, Si)4O8