Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Magnetite with Quartz
Magnetite (Fe3O4)
mineral
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
igneous
Granite
Granite (High-silica plutonic rock)
igneous
Soapstone (Talc-Schist)
Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)
metamorphic
Ruby in Zoisite
Anyolite (composite of Corundum and Zoisite)
metamorphic
Serpentine
Serpentine Group Minerals (e.g., Antigorite, Chrysotile, Lizardite)
Mineral, often found as a rock
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Gneiss (likely Granitic Gneiss)
Gneiss
metamorphic
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
sedimentary
Granite
Granite (Felsic Intrusive)
igneous
Not a rock, mineral, or geological specimen
N/A
Quartz with Chlorite or Hornblende inclusions
Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Green Aventurine and Clear Quartz
Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)
Mineral
Granodiorite (Weathered)
Granodiorite
igneous
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Yellow Quartzite (River Stone)
Quartzite (composed primarily of Quartz: SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite (Yellow/Orange variety)
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Quartzite (Gold/Tan River Cobble)
Quartzite (composed primarily of crystalline SiO2)
metamorphic
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Botryoidal Hematite (Kidney Ore)
Hematite (Fe2O3)
Mineral
Granitic Pegmatite
Pegmatite containing Quartz, Feldspar, and Muscovite mica
igneous
Grey Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist
metamorphic
Conglomerate
Clastic sedimentary rock (composed mostly of SiO2)
sedimentary
Mineral and Rock Collection (Assorted)
Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine
mineral
Calcite
Calcite (CaCO3)
mineral
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Granite (Background) and Quartzite/River Pebble (Foreground Heart)
Phaneritic Felsic Igneous Rock (Granite background)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)
sedimentary
Basalt
Mafic Igneous Rock (composed primarily of pyroxene and plagioclase)
igneous
Basalt
Mafic Volcanic Rock (composed of plagioclase, pyroxene, and olivine)
Igneous