Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Category
Man Made Rock (Technosol)
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Learn about Man Made Rock (Technosol) in the encyclopedia
View all →
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
sedimentary
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Pink Granite
Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)
igneous
Basalt with Quartz Veins
Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Red jasper in gray host rock (likely hematite-stained quartzite or rhyolite)
Jasper: microcrystalline quartz (SiO₂), with iron-oxide coloration; exact host uncertain from image
mineral
Scoria
Scoria
Igneous
Quartz Crystal Cluster on Matrix
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz Crystal on Matrix
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Vein
Extrusive Igneous Rock / Volcanic Rock
igneous
Yellow Chert or Jasper
Microcrystalline Quartz (SiO2)
sedimentary
River Pebble (Quartz/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
sedimentary
Druzy Quartz on Matrix (likely Limestone or Sandstone)
Silicon Dioxide (SiO2) with various trace impurities
Mineral on Sedimentary Rock
Mixed Rock and Mineral Collection
Various geological specimens
igneous, sedimentary, and metamorphic
Unakite
Epidotized Granite
metamorphic
Sandstone
Arenite (SiO2 dominant)
sedimentary
Halite
Sodium Chloride (NaCl)
mineral
Schist
Metamorphic Schist
metamorphic
Coal
Carbonaceous sedimentary rock / Lignite to Bituminous coal
sedimentary
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
mineral
Quartzite with Hematite staining
Quartzite (SiO2) with iron oxide inclusions
metamorphic
Quartzite (River Pebble)
Meta-quartzite (composed primarily of SiO2)
metamorphic
Quartz-veined Mudstone or Argillite
SiO2 (Quartz) in Siltstone/Mudstone matrix
sedimentary
Quartz Vein in Basalt
Silicon Dioxide (SiO2) in Mafic Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Shale
Clastic Sedimentary Rock
sedimentary
Basalt Pebble
Extrusive Igneous Rock
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
River Pebble (Quartzite or Chert)
Silicon Dioxide (SiO2)
metamorphic or sedimentary
Basalt
Basalt (Aphanitic-fine grained mafic igneous rock)
igneous
Sandstone
Sandstone (composed predominantly of Quartz, SiO2)
sedimentary