Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Category
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Green Calcite
Calcium Carbonate (CaCO3)
Hematite
Iron(III) oxide (Fe2O3)
Clear Quartz Sphere
Quartz (Silicon Dioxide, SiO2)
Carnelian
Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)
Pyrite with Calcite
Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
Carnelian Agate
Carnelian (Silicon Dioxide, SiO2)
Agate (or Chalcedony)
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Yellow Calcite
Calcium Carbonate (CaCO3)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Clear Quartz
Silicon Dioxide (SiO2)
Chalcedony (Carnelian variety)
Silicon Dioxide (SiO2)
Carnelian
Carnelian (variety of Chalcedony, SiO2 with iron oxide impurities)
Chalcedony
Silicon Dioxide (SiO₂)
Agate (Geode nodule fragment)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Milky and Bull Quartz)
Silicon Dioxide (SiO2)
Quartz Geode
Clear Quartz (Silicon Dioxide, SiO2)
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
Quartz Geode (with Agate banding)
Silicon Dioxide (SiO2)
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
Columnar Calcite / Satin Spar
Calcite (Calcium Carbonate, CaCO3)
Black Opal
Hydrated Silica (SiO2·nH2O)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
Quartz Sand Gravel
Silicon Dioxide (SiO2)
Orbicular Jasper (Ocean Jasper tendency)
Silicon Dioxide (SiO2) with impurities
Jasper Marble
Silicon Dioxide (SiO2) with Impurities
Chert (Yellow Jasper)
Silicon Dioxide (SiO2)