Sandstone (Quartzose type)
Arenite (primarily SiO2)
sedimentary
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Metamorphic Rock
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Sandstone
Arenite (Siliclastic sedimentary rock, primarily SiO2)
sedimentary
Green Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Granodiorite (or Granite) Pebble
Phaneritic Felsic Igneous Pebble
igneous
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Green Quartzite (Aventurine-like)
Quartzite (primarily SiO2 with trace Fuchsite mica inclusions)
metamorphic
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Granite
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)
Igneous
Vesicular Basalt (Amygdaloidal)
Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)
igneous
Granodiorite
Granodiorite
igneous
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)
sedimentary
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
igneous
Red Granite
Potassium-feldspar rich Granite
igneous
Coquina
Bioclastic Limestone (Coquina)
sedimentary
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 principal composition)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Granite (specifically Pink or Alkali Feldspar Granite)
Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Basalt
Basalt
Igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt with Plagioclase Microphenocrysts
Amygdaloidal or Porphyritic Basalt
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)
metamorphic
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Slate
Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)
metamorphic
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Basalt
Basalt (composition of plagioclase feldspar, pyroxene, and olivine)
igneous
Yellow Quartzite (Beach Pebble)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Jade (likely Nephrite or Jadeite)
Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
Metamorphic rock (for Nephrite and some Jadeite); Mineral (for Jadeite)
Quartzite with Quartz Veins
Quartzite (chiefly SiO2)
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Quartzite Pebbler
Quartzite (SiO2)
metamorphic