Calcite
Calcium Carbonate (CaCO3)
Category
Browse sedimentary mineral specimens identified by the Rock Identifier community.
Calcite
Calcium Carbonate (CaCO3)
Celestite (Celestine) Geode
Strontium Sulfate (SrSO4)
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
Celestite (Celestine)
Strontium sulfate (SrSO4)
Celestite (Celestine)
Strontium sulfate (SrSO4)
Blue Caribbean Calite
Calcium Carbonate (CaCO3) with trace Aragonite
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
Hematite
Hematite (Fe2O3)
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Red Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Jasper
Cryptocrystalline quartz (SiO2)
Jasper
Silicon dioxide (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Picture Jasper
SiO2
Red Jasper
Jasper (Silicon Dioxide) - SiO2
Ferruginous Quartz (Carnelian/Sardine Jasper)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
Red Jasper (River Pebble)
Silicon Dioxide (SiO2) with iron oxide inclusions
Jasper
Chalcedony (SiO2)
Jasper (brecciated or orbicular variety)
Silicon dioxide (SiO2) with iron oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
Jasper
Silica (SiO2) with impurities
Red Jasper (River Polished)
Silicon Dioxide (SiO2) with Hematite impurities
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
Red Jasper (Brecchiated Jasper)
Silicon Dioxide (SiO2) with Hematite impurities
Banded Agate (Mutton-fat or Pork-stone variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper (River Polished)
Jasper (Silicon Dioxide, SiO2)
Red Jasper
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
Jasper
Silicon Dioxide (SiO2)
Tree Agate
Chalcedony with Dendritic Chlorite (SiO2 with impurities)
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Obsidian and Green Calcite
Volcanic Glass and Calcium Carbonate (CaCO3)
Quartz pebble
Silicon dioxide (SiO2)
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
Sandstone (Picture Sandstone)
Arenite (primarily SiO2)
Pyrite
Iron Sulfide (FeS2)
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock