Jasper (Petrified Wood Variety)
Silicon Dioxide (SiO2)
sedimentary
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
Red Jasper (possibly Petrified Wood)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary (secondary formation)
Agate
Silicon dioxide (SiO2)
mineral
Blue Lace Agate
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Gold Nugget Jewelry
Native Gold (Au)
mineral
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Banded Agate (specifically Carnelian Agate color)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Chert (Basanite / Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous/Banded)
Clastic Terrigenous Sandstone (SiO2 with Fe2O3 cement)
sedimentary
Serpentinite
Serpentinite (group of hydrous magnesium iron phyllosilicates)
metamorphic
Dalmation Stone
Peralkaline Rock (SiO2 with Arfvedsonite)
igneous
Ruby in Zoisite with Hornblende
Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))
metamorphic
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
metamorphic
Serpentinite
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Snowflake Obsidian
Volcanic glass containing Spherulitic Cristobalite (SiO2)
igneous
Basalt with Quartz Veins
Basalt (SiO2 range 45-52%)
igneous
Ambergris
Ambergris (Coprolite-adjacent/Organic secretion)
mineraloid
Pearl
Aragonite and Conchiolin (CaCO3 + organic protein)
mineraloid
Granite
Granite
igneous
Sandstone (Pebble)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Schist (Biotite/Muscovite rich)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate Geode
Silicon Dioxide (SiO2)
mineral
Copper Ore with Chrysocolla and Azurite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Flagstone (Sandstone)
Clastic Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Gneiss (specifically a weathered or stream-worn specimen)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Fossiliferous Shale (with Vertebrate Bones)
Laminated Mudstone containing Fossilized Bone (Apatite)
sedimentary
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Dalmatian Jasper
Peralkaline rhyolite with Arfvedsonite inclusions
igneous
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
mineral (silicate-replaced organic material)
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Granite
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)
igneous
Glaucophane Schist (Blueschist)
Blueschist (Glaucophane-bearing schist)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Weathered Pebble)
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Limonitic Sandstone with Inclusion
Limonitic Quartz Sandstone (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Ocean Jasper
Silicon dioxide with impurities (SiO2 + impurities)
sedimentary