Granite
Intrusive Igneous Rock (Felsic)
igneous
Category
Mineral Group
Browse mineral group specimens identified by the Rock Identifier community.
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Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Limonite
FeO(OH)·nH2O
mineral
Chrysocolla with Malachite
Cu2-xAlx(H2-xSi2O5)(OH)4%CnH2O (Chrysocolla)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,4)10(O,F,OH)2
mineral
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral
Veined Sandstone with Calcite Veins
Sedimentary sandstone with hydrothermal/mineral veins
sedimentary
Orthoclase Feldspar (Granitic)
KAlSi3O8 (Potassium Feldspar)
igneous
Quartz Vein Rock
Silicon dioxide (SiO2) within a host rock matrix
mineral
Limonite
FeO(OH)•nH2O
mineral
Mica Schist
Metamorphic rock dominated by micas (muscovite, biotite)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Limonite
FeO(OH)·n(H2O)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Pyrite or Chalcopyrite specimen (Gold-colored mineral coating)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Pink Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Copper-bearing Quartz Vein in Host Rock
Quartz with Malachite/Chrysocolla staining
igneous/metamorphic with mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Gravel and Sediment Sample
Mixed clastic sediment
sedimentary
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
igneous
Unidentified dark mineral/rock fragment
Indeterminate; appearance may fit a sulfide-bearing rock or iron-rich mineral
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)