Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)3Si3O10(OH)2)
metamorphic
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Rose Quartz
Rose Quartz (SiO2)
Mineral
Gossan (Iron Hat)
Limonitic Gossan (predominantly FeO(OH)·nH2O)
igneous/metamorphic derivative
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Schist
Schist (various mineral compositions)
metamorphic
Porphyritic Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Granite
Phaneritic Intrusive Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Lapis Lazuli
Complex mixture of minerals, primarily Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Ferruginous Sandstone (Ironstone)
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Unakite
Unakite (Epidotized Granite)
metamorphic
Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
metamorphic
Wonderstone
Banded Rhyolite (SiO2 with impurities)
igneous
Mica-rich Sandstone or Micaceous Schist Weathering
Micaceous Schist (Muscovite-Quartz composition)
Metamorphic or Sedimentary depending on local grade
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Granodiorite (Gneissic texture)
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Sandstone (Yellow/Siltstone variant)
Arenite (SiO2 primarily)
sedimentary
Smoky Quartz (Tumbled)
Smoky Quartz (SiO2 - Silicon Dioxide)
mineral
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
Ferruginous Sandstone
Sandstone (arenite) with Limonite/Goethite cement
sedimentary
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Ferruginous Quartz (Iron-stained Quartz)
Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)
mineral
Rough Green Sapphire (Corundum)
Corundum (Al2O3 - Aluminum Oxide with trace elements)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Greenstone (Epidote/Chlorite Schist)
Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
metamorphic
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
sedimentary
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Desert Rose
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O) or Barite (Barium Sulfate, BaSO4)
mineral
Diamond (in Gold Jewelry)
Carbon (C)
mineral
Orthoclase (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Granite
Phaneritic plutonic felsic rock (primarily Quartz, Feldspar, and Mica)
igneous
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Green Aventurine (Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)
metamorphic
Sandstone
Arenite
sedimentary