Green Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
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Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
metamorphic
Rose quartz (likely)
Quartz, silicon dioxide (SiO₂), pink variety
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Gold Nugget
Native Gold (Au)
mineral
Green Gneiss or Greenschist
Chlorite/Actinolite Gneiss or Schist
metamorphic
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Sandstone (Weathered)
Arenite (primarily SiO2)
sedimentary
Peach Aventurine
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Veined Limestone
Sedimentary Calcite-Veined Rock (CaCO3)
sedimentary
Tumbled rose quartz (probable)
Quartz, silicon dioxide (SiO₂), rose-colored variety
mineral
Banded agate (likely quartz-rich chalcedony)
Microcrystalline quartz, SiO₂; possibly agate with a weathered iron-rich host rock
mineral
Green fluorite crystal
Fluorite (calcium fluoride, CaF₂)
mineral
Green aventurine jade-style cabochon (likely dyed chalcedony or glass imitation)
Quartz/chalcedony, SiO₂; exact material is uncertain from the image
mineral
Brown Chert
Cryptocrystalline Silica (SiO2)
sedimentary
Sandstone
Arenite (Secondary classification based on grain size)
sedimentary
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
gemstone
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L or H Type)
Mineral
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
sedimentary
Iron-stained quartz-rich rock fragments
Likely quartz (SiO₂) with limonite/goethite iron oxides; possibly quartzite or silicified rock
mineral
Tourmalinated Quartz
Quartz (SiO2) with included Tourmaline (complex borosilicate)
Mineral composite
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
sedimentary
Milky quartz-bearing rock, possibly quartzite
Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix
metamorphic
Schalenblende
Sphalerite with Wurtzite, Galena, and Marcasite/Pyrite
mineral
Gold
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Banded Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with iron oxide impurities)
sedimentary
Tumbled greenish chalcedony or serpentine pebble
Likely microcrystalline quartz (chalcedony, SiO₂) or serpentine-group mineral; exact identification requires testing
mineral
Limonite
Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O
mineral
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)
metamorphic