Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
sedimentary
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Rose Quartz
Rose Quartz (SiO₂)
Mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Agate (Common Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
mineral group
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
Mineral
Serpentine
Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide staining)
sedimentary
Rose Quartz
Quartz (SiO2) with trace elements of titanium, iron, or manganese
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
sedimentary
Amber
Succinite (fossilized resin)
Mineral
Sandstone (with biological crust)
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz-rich Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Sandstone (likely with Borings or Vesicular Basalt)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Mineral in Metamorphic/Igneous Host
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Halite
Halite (Sodium Chloride, NaCl)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Porphyritic Andesite
Andesite
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Rutilated Quartz
SiO2 with TiO2 inclusions
Mineral
Ironstone with Pyrite
Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral