Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
Category
Browse man made metamorphic style composite specimens identified by the Rock Identifier community.
Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)
Slate
Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)
Sandstone
Arenite
Red Sandstone
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)
Granite
Intrusive Igneous Rock
Brecciated Jasper
Silicon dioxide (SiO2) microcrystalline quartz breccia
Granite
Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Granite
Phaneritic Felsic Intrusive Igneous Rock
Sandstone
Arenite (primarily SiO2)
Sandstone
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
Sandstone (Quartz-rich)
Arenite
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
Quartzite
Quartzite (primarily SiO2)
Quartz with Iron Oxide
SiO2
Quartzite pebble
Quartzite (SiO2 based)
Quartzite
Metamorphic Quartzite
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Magnetite
Magnetite (Fe3O4)
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
Quartz (Pink / Rose Quartz variant)
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz Pebble
Silicon Dioxide (SiO2)
Kfeldspar (Potassium Feldspar)
KAlSi3O8
Mixed rock and mineral specimen collection
Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks
Tumbled pale green calcite
Calcite (CaCO₃)
Milky quartz
Quartz (silicon dioxide, SiO₂)
Quartz pebble
Silicon dioxide (SiO2)
Copper and Quartz beads
Native Copper (Cu) and Crystalline Quartz (SiO2)
Rose Quartz
Silicon Dioxide (Quartz), SiO2