Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
Category
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
Garnet
Garnet Group (Silicate Minerals)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
Quartz Crystal Point
Silicon Dioxide (SiO2)
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
Labradorite
(Ca, Na)(Al, Si)4O8
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
White Quartz (Mushroom Carving)
Quartz (Silicon Dioxide - SiO2)
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)
Epidote with Quartz/Feldspar
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Rose Quartz
Silicon dioxide (SiO2) with trace titanium, manganese, or iron
Porphyritic Rhyolite (Birdseye Rhyolite)
Rhyolite (Porphyritic texture)
Basalt River Stone
Basaltic Igneous Rock
Granite Pebble
Igneous Intrusive Rock (Quartz-Feldspar-Mica Phenocrysts)
Granite
Granite (composed mainly of Quartz, Feldspar, and Mica)
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
Basalt
Mafic Volcanic Rock (composed of plagioclase, pyroxene, and olivine)
Citrine
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2)
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions
Biotite (Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
Quartz (Variety: Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
Milky Quartz
Silicon Dioxide (SiO2)
Eudialyte in Matrix
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Labradorite
(Ca,Na)(Al,Si)4O8
Labradorite
Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Gold
Native Gold (Au)
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
Hypersthene
Hypersthene ((Mg,Fe)SiO3)
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2