Limonite (with Goethite/Ironstone)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Category
Anthropogenic (Man Made Product Subject To Geological Processes)
Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.
Orange Calcite (often commercially sold as Honey Calcite or Aragonite)
Calcium Carbonate (CaCO3)
mineral
Sandstone (Pebble/Cobble)
Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)
Sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Basalt (River Stone/Pebble)
Basalt (Extrusive Igneous Rock)
igneous
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Matrix
igneous/metamorphic
Red Sandstone
Arenite (primarily Quartz with Iron Oxide)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Moqui Marble (Shaman Stone)
Ironstone Concretion (Fe2O3) - primarily Hematite or Goethite shell with Sandstone core
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Gold Ore
Native Gold in Quartz (Au)
mineral
Limestone
Calcium carbonate ( преимущественно CaCO3)
sedimentary
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Epidote with Unakite characteristics
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Gold (in Opaque Matrix/Jewelry)
Native Gold (Au)
mineral
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)
Chert (microcrystalline quartz)
Metamorphic Rock
Carnelian
Carnelian (variety of Chalcedony, SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Ferruginous Sandstone (Ironstone)
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Mineral
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral