Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Category
Anthropogenic (Human Made) Sedimentary Like Material
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Iron Slag
Vitreous glassy waste (Fe-Si-Al-Ca compounds)
Mineral byproduct (anthropogenic / techno-fossil)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Manganese Ore (Psilomelane/Pyrolusite)
Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)
Mineral
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Rough Quartz (Alluvial Pebbles)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Porous Quartzite
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Lapis Lazuli
Lapis lazuli (a rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Fossil Shell (Bivalve)
Class Bivalvia (Likely a member of the Ostreidae or Gryphaeidae family), CaCO3
sedimentary
Black Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)
metamorphic
Granite Cobble
Felsic Intrusive Igneous Rock
igneous
Banded Chert (Ironstone/Jasper)
Cryptocrystalline Quartz (SiO2) with Iron Oxides
sedimentary
Jasper Conglomerate (Puddingstone)
Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)
sedimentary
Granitoid (Granitic Rock)
Granitoid (Quartzo-feldspathic plutonic rock)
igneous
Howlite (Dyed Turquoise)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)
mineral
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite and Quartz inclusions
sedimentary
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary
Bicolor Quartz Pebble
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Sandstone
Arenite (primarily SiO2 with iron oxide cementation)
sedimentary
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Mineral
Rhyolite
Rhyolite
igneous
Red Quartzite
Quartzite (primarily SiO2)
metamorphic
Fancy Jasper (Agate/Chert mix)
Silicon Dioxide (SiO2) with impurities
sedimentary
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Chlorastrolite (Isle Royale Greenstone)
Chlorastrolite (Pumpellyite-(Mg,Fe2+): Ca2MgAl2(Si2O7)(SiO4)(OH)2∙H2O)
mineral
Mahogany Obsidian
Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2
igneous
Rough Quartz (Grey-Green)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Micaceous Sandstone or Quartzite
Sandstone (lithified quartz grains, often with mica) or Quartzite (metamorphosed sandstone)
Sedimentary or Metamorphic
Obsidian (specifically Rainbow or Silver Sheen Obsidian)
Volcanic Glass (predominantly SiO2)
Igneous
Banded Chert
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite (SiO2 dominant)
sedimentary
Sandstone (with differential weathering)
Arenite / Quartz Sandstone (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Mineral