Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Jasper Agate (specifically Brecciated Jasper)
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Amethyst (Chevron or Banded variety)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Ruby in Zoisite (Anyolite)
Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))
metamorphic
Slate
Slate (foliated metamorphic rock)
metamorphic
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
mineral
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Fossilized Fish Skeleton in Matrix
Vertebrata (Class: Actinopterygii), typically found in limestone or shale matrices
sedimentary
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Vesicular Basalt (Iron-Stained)
Mafic Volcanic Rock (Basalt)
igneous
Chert (Septarian Nodules / Weathered Silex)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Sandstone
Arenite
sedimentary
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
metamorphic
Yellow Jasper
Cryptocrystalline quartz (SiO2) with iron inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
sedimentary
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Orbicular Granite
Orbicular Granidiorite / Plutonic Igneous Rock
igneous
Chert (White/Gray variety)
Chert (SiO2)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Chert (Cherty Flint/Jasper variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Moss Agate and Druzy Quartz Carving
Cryptocrystalline Silica (SiO2) with impurities
mineral
Chert Pebble
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Conglomerate
Conglomerate
Sedimentary
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
River Rock (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock
sedimentary
Poppy Jasper
Jasper (variety of Chalcedony), SiO2 (Silicon Dioxide)
sedimentary