Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Chemically Precipitated Mineral) in the encyclopedia
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Iron-rich concretion or weathered ironstone
Goethite–hematite limonite aggregate; commonly described as limonite or ironstone
sedimentary
Banded calcite (likely cave deposit or vein fragment)
Calcite, CaCO₃
mineral
Septarian Nodule
Septarian Concretion (CaCO3 with Calcite/Aragonite and Clay/Mudstone)
sedimentary
Honey calcite (orange calcite)
Calcite, calcium carbonate (CaCO₃)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
mineral
Chert or flint nodule
Microcrystalline quartz (SiO₂), likely chalcedony-rich chert
sedimentary
Liesegang Banded Sandstone (Concretion / Weathered Pebble)
Sandstone showing Liesegang rings / Weathering rind (SiO2 with iron oxides)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation with Hematite and Jasper
sedimentary
Small translucent quartz pebble
Quartz (silicon dioxide, SiO₂), possibly milky or chalcedonic quartz
mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Flint (Chert)
Cryptocrystalline Silica (SiO2)
sedimentary
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
sedimentary
Fossiliferous Limestone
Calcite (CaCO3) matrix with biogenic fragments
sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Moqui Marble
Ironstone Concretion (Goethite/Hematite)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Blue Aragonite (polished)
Aragonite (CaCO3)
mineral
Weathered quartz-rich pebble
Likely massive quartz (SiO₂), possibly quartzite or silicified rock
mineral
Dyed Howlite (often sold as Turquenite)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Banded Calcite Onyx (Cave Onyx / Mexican Onyx)
Calcite (CaCO3) / Travertine
sedimentary
Light-colored limestone pebble
Calcite-rich limestone (primarily CaCO₃)
sedimentary
Banded iron formation (ironstone)
BIF; alternating hematite/magnetite and chert (SiO₂) layers
sedimentary
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Eroded Limestone with Iron Staining
Carbonate Rock (CaCO3)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Rose Quartz or Jasper variety)
Silicon Dioxide (SiO2)
mineral
Yellow calcite (honey calcite)
Calcite, calcium carbonate (CaCO₃)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ocean Jasper or Orbicular Jasper
SiO2
mineral
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial dyes
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Likely ironstone concretion
Iron-oxide-cemented sedimentary concretion, commonly hematite/goethite-rich
sedimentary
Quartz vein in weathered host rock
Quartz (SiO₂), likely in a weathered metamorphic or igneous matrix
mineral
Tumbled quartz (likely rose or milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Banded iron formation (banded ironstone)
BIF, chiefly hematite/magnetite and microcrystalline quartz (chert); locally limonite/goethite
sedimentary