Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite in Matrix (likely Quartz or Schist matrix)
Iron Sulfide (FeS2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Turquoise (Green variety)
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Jasper
Jasper (Silicon Dioxide, SiO2)
Yellow Jasper
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Carnelian
Carnelian (Microcrystalline Quartz, SiO2 with Fe2O3 impurities)
Blue Calcite
Calcium Carbonate (CaCO3)
Carnelian
Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)
Chert (Field-collected specimen)
Chert (Crystalline Silica, SiO2)
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
Red Jasper
Jasper (Silicon Dioxide with Hematite inclusions), SiO2
Chert (Chert Nodule in Limestone)
Microcrystalline Quartz (SiO2)
Schist with Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Caribbean Calcite
Calcite and Aragonite (CaCO3)
Quartz (Clear / Rock Crystal)
Silicon Dioxide (SiO2)
Chert (often colloquially called Flint)
Chert (Microcrystalline Quartz, SiO2)
Carnelian (Agate/Chalcedony)
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (SiO2) - variety: Chalcedony
Jasper
Silicon dioxide (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Geode (unopened)
SiO2 - Chert-shelled concretion (mostly Quartz)
Yellow Jasper
Chalcedony (SiO2)
Quartz (Microcrystalline variety)
Silicon Dioxide (SiO2)
Banded Agate (specifically Carnelian Agate slice)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Orange Calcite
Calcium Carbonate (CaCO3)
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)
Gneiss
High-grade regional metamorphic rock (Foliated)
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
White Calcite
Calcium Carbonate (CaCO3)
Green Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Yellow Agate / Chalcedony
Silicon Dioxide (SiO2)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Magnetite (potentially Hematite-rich)
Magnetite (Fe3O4)