Quartz Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Banded Sandstone (Zebra Stone)
Arenite with Iron Oxide Banding (Liesegang rings)
sedimentary
Green Aventurine (Fuchsite-bearing Quartz)
Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Stone/Ocher)
Limonite (FeO(OH)·nH2O)
mineral
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Mineral
Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Granite
Phaneritic Felsic Intrusive Rock (Granite)
Igneous
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Sandstone
Arenite
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Black Sand (Magnetite/Heavy Mineral Concentrate)
Magnetite-rich Placers (Fe3O4)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (Ironstone)
Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Wishing Stone with Quartz Vein
Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Sandstone
Arenite
sedimentary
Shale
Shale (Lutite)
sedimentary
Ironstone Concretion / Limonite-stained Siltstone
Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)
sedimentary
Coarse-grained Granite
Granitoid (Felsic Plutonic Rock)
igneous
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
sedimentary
Sandstone (Water-worn pebble)
Arenite (primarily SiO2)
sedimentary
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Quartzite
Quartzite (Primary mineral: Quartz, SiO2)
metamorphic
Serpentinite
Serpentinite (composed primarily of minerals in the serpentine group: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
metamorphic
Blue Dyed Agate
Cryptocrystalline Quartz (SiO2)
mineral
Amethyst Lace Agate / Banded Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral