Greenstone (Greenschist facies)
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
metamorphic
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Limonite and Goethite encrusted Chert/Ironstone
Hydrated Iron Oxide (FeO(OH)·nH2O) with cryptocrystalline Silica (SiO2)
sedimentary
Epidote (Unakite-related)
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Scoria (Lava Rock)
Scoria (Extrusive Igneous Rock / Mafic Silicates)
igneous
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
mineral
Lapis Lazuli
Lapis Lazuli (Metamorphic rock containing lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, calcite, and pyrite)
metamorphic
Red Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Hematite
Iron (III) Oxide (Fe2O3)
mineral
Pumice
Pumice (a highly vesicular volcanic rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pumice
Pumice (a highly vesicular extrusive igneous rock)
igneous
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2) matrix
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Prehnite
Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)
mineral
Hematite (Concretion)
Iron(III) oxide (Fe2O3)
mineral
Quartz Geode or Druzy Quartz in Host Rock
Silicon Dioxide (SiO2)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (specifically Yellow/Common Opal or Jasper mixture)
Silicon Dioxide (SiO2)
sedimentary
Shungite
Non-crystalline carbon (Fullerenes / Carbon-60)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions (typically Fuchsite)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper
SiO2 (Silicon Dioxide)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
SiO2 (Crystalline Quartz)
metamorphic
Botryoidal Hematite (Iron Stone Conglomerate)
Hematite (Fe2O3) in sedimentary matrix
sedimentary
Popcorn
Zea mays everta (P. Wilson) (Botanical name for the corn variety)
Organic/Biogenic
Slate
Slate (Foliated Metamorphic Rock)
metamorphic
Epidote (or Epidote-rich rock)
Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).
Mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks
Red Jasper
Jasper (Silicon Dioxide with iron oxide inclusions), SiO2
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Mineral
Pumice
Highly vesicular volcanic glass (unnamed scientific variant: Rhyolitic/Andesitic Pumice)
igneous
Quartzite
Quartzite (SiO2)
metamorphic