Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Physico Chemical Precipitate)
Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.
Limonite
Limonite (FeOO·nH2O)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO₂)
Mineral
Celadonite in Basalt (Green Earth)
Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)
mineral
Chert (Jasper/Flint variant)
Microcrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) containing a Rugosa (Horn Coral) fossil
sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide SiO2)
sedimentary
Quartz (with inclusions / Sandstone fragment)
Silicon Dioxide (SiO2)
mineral
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
igneous and sedimentary mixture
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a geode
sedimentary
Jasper with Hematite Inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Hematite Nodule
Hematite (Fe2O3)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Chert / Flint Nodules in Limestone
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Chert (often called Jasper or Flint in this color variety)
Silicon Dioxide (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (often called Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Amber (specifically Cherry Amber)
Succinite (with the chemical formula C10H16O)
Organic Gemstone (not a mineral)
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (chemical formula: C10H16O)
Organic Gemstone (not a rock or mineral)
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Jasper, Agate, Quartz Mix (Polished Beads)
SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.
Mineral/Semiprecious Gemstone (variety of Quartz)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian concretion (CaCO3 with Aragonite and Calcite)
sedimentary
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral