Granite
Phaneritic intrusive igneous rock
igneous
Category
Mineral Side Rock
Browse mineral side rock specimens identified by the Rock Identifier community.
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Unidentified weathered mineral/rock fragment
Indeterminate; likely a weathered iron-rich silicate or sulfide-bearing specimen
mineral
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Mineral for Fluorite; Mineral/Rock for Jadeite (as it's often a rock composed primarily of jadeite mineral)
N/A (Non-Geological Specimen)
N/A
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone (Red)
Arenite (composed primarily of SiO2)
sedimentary
Shale
Shale (Lutite)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Ironstone Concretion (Moqui Marble / Boji Stone)
Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Unidentified gray rock/mineral specimen
Indeterminate; possibly quartz-rich rock or a metallic sulfide-bearing specimen
mineral
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Copper Ore (Malachite and Azurite on Host Rock)
Cuprite, Malachite, and Azurite dissemination in gangue
mineral
Granite Pebbles
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
igneous
Quartz-Veined Gneiss or Metamorphic Rock with Quartz Veins
Quartz-veined metamorphic rock (Silicate mineral assemblage)
metamorphic
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Druzy Quartz on Chalcedony Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone Pebble
Sandstone (Silicon dioxide-rich clastic sedimentary rock)
sedimentary
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Copper Ore
Cupriferous Rock / Mixed Mineral Matrix
igneous
Light-colored granite or granitic gneiss
Granite; typically quartz + feldspar + mica (variable composition)
igneous
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz Vein in Basalt or Porphyry
Silicate-veined volcanic rock
igneous
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Weathered granitic rock
Granite, likely quartz–feldspar–mica aggregate
igneous
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Bauxite (Laterite Clay)
Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Generic Pebble
Lithic Fragment
sedimentary
Quartz-veined Basalt or Limestone Pebble
Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)
sedimentary