Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Category
Synthetic Material (Not A Rock Or Mineral)
Browse synthetic material (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Synthetic Material (Not A Rock Or Mineral) in the encyclopedia
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Banded gneiss
Gneiss, chiefly quartz–feldspar–mica (variable composition)
metamorphic
Colorless faceted gemstone (most likely synthetic cubic zirconia)
Cubic zirconia, ZrO₂ (likely synthetic); natural alternatives include quartz or diamond
gemstone
Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Red Sandstone (Iron-rich)
Arenite (with Hematite cement)
sedimentary
Banded metamorphic rock, likely mica schist or gneiss
Quartz–feldspar–mica schist/gneiss; exact identification requires a fresh surface and mineral tests
metamorphic
Banded Siltstone
Banded Siltstone / Laminated Siltstone
sedimentary
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone (River Cobble)
Sandstone (composed predominantly of SiO2 - Quartz)
sedimentary
Quartz-bearing iron-stained breccia
Brecciated quartz/quartzite with iron oxides, chiefly SiO₂ with hematite/goethite and possible feldspar or host-rock fragments
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Seashell Fossil
Gastropoda fossil
fossil
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Jasper and Basalt Pebble
Polymineralic lithic pebble
igneous and sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Raw Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
mineral
Sandstone (likely Arkosic)
Arenite (SiO2 with KAlSi3O8)
sedimentary
Build-A-Bear Plush (Non-Geological)
Polyester fibers (C10H8O4)n and Synthetic Polymers
Anthropogenic / Non-mineral
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Opalite
Man-made opalescent glass
gemstone
Crushed Stone / Gravel
Aggregate (mixed lithology)
sedimentary
Red Agate (Carnelian)
Silicon Dioxide (SiO2)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
sedimentary
Veined Pebble (Septarian or Quartz-Veined Chert/Basalt)
Silicon Dioxide (SiO2) veins in matrix
sedimentary
Carved serpentine wing sculpture
Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Weathered)
Arenite (primarily SiO2)
sedimentary
Sandstone (clastic)
Clastic Sedimentary Rock (primarily composed of SiO2)
sedimentary
Quartz (Smoky/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkosic or Quartzose)
Sandstone (SiO2 dominated)
sedimentary
Sandstone (Quartzite Pebble)
Arenite (SiO2)
sedimentary