Quartz Cobble (River Rock)
Silicon Dioxide (SiO2)
Category
Browse industrial byproduct specimens identified by the Rock Identifier community.
Quartz Cobble (River Rock)
Silicon Dioxide (SiO2)
Banded Calcite (variety Honey Calcite / Chocolate Calcite)
Calcium Carbonate (CaCO3)
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Crushed Limestone
Sedimentary Calcium Carbonate (CaCO3)
Sodalite-rich Syenite (Sunset Sodalite)
Sodalite-Syenite (Na8[Al6Si6O24]Cl2 with KAlSi3O8)
Chalcedony (Smoky Quartz or Agate nodule fragment)
Silicon Dioxide (SiO2)
Diamond
Carbon (C)
Osumilite in Granite Matrix
(K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30
White Marble
Recrystallized Calcite / Calcium Carbonate (CaCO3)
Fluorite (often referred to as Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
Yellow Quartzite (Onyx Pebble)
Silicon Dioxide (SiO2) - Quartzite
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (composed primarily of SiO2)
Chalcedony (Moonstone variant or White Agate)
Silicon Dioxide (SiO₂)
Marble
Metamorphosed Limestone (principally CaCO3)
Eclogite
Eclogite (composed primarily of Omphacite and Pyrope Garnet)
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (SiO2)
Chert (and Jasper/Chalcedony variety)
Microcrystalline Quartz (SiO2)
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
Anthracite Coal
Anthracite
Magnetite
Magnetite (Fe3O4)
Sandstone (with cross-bedding)
Arenite (composed primarily of Quartz: SiO2)
Quartzite
Quartzite (primarily SiO2)
Sandstone Chert/Quartzite
Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite
Olivine (Peridotite/Dunite)
Olivine (Mg,Fe)2SiO4 within Peridotite
Banded Iron Formation (BIF) / Red Jasper with Hematite
Ferruginous Chert (primarily Quartz [SiO2] and Hematite [Fe2O3])
Yellow Calcite
Calcium Carbonate (CaCO3)
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Matrix
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Quartz / Common Opal Transition
Silicon Dioxide (SiO2)
Diamond
Diamond (pure Carbon, C)
Basalt
Basalt (SiO2 percentage between 45% and 52%)
Quartzite
Quartzite (SiO2)
Cubic Zirconia
Zirconium Dioxide (ZrO2)
Diamond (Faceted)
Carbon (C)
Blue Calcite
Calcium Carbonate (CaCO3)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)