Granodiorite
Phaneritic-textured Intrusive Granodiorite
igneous
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
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Lapis Lazuli (Low-grade)
Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)
metamorphic
Mahogany Obsidian
Volcanic glass containing Magnetite/Hematite
igneous
Granite (Pink/Red)
Phaneritic Igneous Rock (Rich in K-Feldspar)
igneous
K2 Jasper (K2 Granite)
Azulite in Granite (Quartz + Feldspar + Biotite + Azurite)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Epidote in Quartz
Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH)) / Quartz (SiO2)
metamorphic
Mixed rock and mineral collection
Multiple specimens; visible examples may include quartz (SiO₂), amethyst (quartz), calcite (CaCO₃), and dark mafic rocks
mineral
Epidote (Unakite variety)
Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Epidote in Matrix (Unakite-like Rock Fragment)
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) / Altered Metamorphic Pebble
metamorphic
Granite Pebble
Granite
igneous
Gabbro
Gabbro
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)
igneous
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock
igneous
Rhyolitic Tuff
Rhyolitic Tuff / Pyroclastic rock
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock (Granite)
igneous
Graphite
Graphite (Carbon, C)
mineral
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Leopard Skin Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Graywacke
Graywacke Sandstone
sedimentary
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
sedimentary
Gravel and Pebbles
Unconsolidated rock fragments (clastic sediment)
sedimentary
Mookaite Jasper
Silicified radiolarite (SiO2)
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Polished brown jasper
Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich variety
mineral
Epidosite
Epidosite (composed primarily of Epidote and Quartz)
metamorphic
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)
Silicon Dioxide (SiO2) with various inclusions
mineral
Bauxite (Iron-stained Chert / Ironstone Aggregate)
Hydrous aluminum oxide mixture (mainly Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Goethite α-Fe3+O(OH))
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Devil's Toenail (Fossil Oyster)
Gryphaea arcuata (Calcium Carbonate, CaCO3)
sedimentary
Olivine in Quartz/Feldspar Matrix (Peridotite or Granitic Pegmatite)
(Mg,Fe)2SiO4 (Olivine) with Quartz / Feldspar
igneous
Quartz with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
igneous
Jasper Rose Quarts / Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Granitic Quartz or Pegmatite
Quartz with Orthoclase Feldspar (SiO2 + KAlSi3O8)
igneous
Glauconitic Sandstone (Greensand)
Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Mixed River Stones and Agates
Mixed Silicates and Ironstones (primarily SiO2 and Fe2O3)
sedimentary
Mixed Mineral Bead Bracelet
Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)
gemstone
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Jasper-Quartz Conglomerate / Chert
Siliceous Sedimentary Rock (SiO2)
sedimentary