Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
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Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Magnetite / Ironstone
Magnetite (Fe3O4)
mineral
Nuummite
Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gabbro
Gabbro (Mafic Plutonic Rock)
igneous
Mica Schist
Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz with Garnet/Hematite and Basalt
Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Chrysocolla (on host rock)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)
mineral
River Rocks (Polished River Pebbles)
Stream-rounded clastic sediments
Mixed (Sedimentary, Igneous, and Metamorphic)
Pink Tourmaline (Rubellite)
Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Aventurine
Silicon Dioxide (Quartz with inclusions), SiO2
mineral
Sandstone with Desert Varnish
Arenite (SiO2 predominantly) with Ferromanganese coating
sedimentary
Mixed Mineral Collection (with Quartz, Beryl, and host rock)
Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Milky Quartz with Chlorite/Epidote
Silicon Dioxide (SiO2) with phyllosilicate or sorosilicate inclusions
mineral
Ruby in Zoisite (Anyolite)
Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))
metamorphic
Sandstone with Quartz Vein
Arenite with Crystalline Silica (SiO2)
sedimentary
Magnetite with Pyroxene
Magnetite (Fe3O4) in Mafic Igneous Matrix
mineral/igneous
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase Feldspar)
igneous
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Serpentinite (with Pyrite/Garnet inclusions)
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Tiger's Iron
Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)
metamorphic
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Garnet (almandine or pyrope variety)
Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Epidote (Greenstone)
Amygdaloidal Basalt (Ca2(Al, Fe)3(SiO4)3(OH) inclusions)
igneous
Magnetite Orthorthotropic Rock
Magnetite (Fe3O4)
mineral
Milky Quartz
Quartz (SiO2)
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous