Quartzite
Quartzite (SiO2)
Category
Browse organic (geological interest) specimens identified by the Rock Identifier community.
Quartzite
Quartzite (SiO2)
Granite
Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)
Chert (Nodule)
Microcrystalline Silica (SiO2)
Chert (or Flint)
SiO2 (predominantly microcrystalline quartz)
Chert
Silicon dioxide (SiO2)
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
Granite
Granite (a felsic intrusive igneous rock)
Granite
Granite (felsic intrusive igneous rock)
Unakite
Epidote-Feldspar rock (specifically, a variety of granite)
Chert
Chert (microcrystalline quartz, SiO2)
Granite
Granite (a felsic intrusive igneous rock)
Crushed Limestone
Calcium Carbonate (CaCO3)
Granite
Granite (a plutonic igneous rock)
Chert
Chert (microcrystalline quartz)
Calcite
Calcite (CaCO3)
Black Chert
Chert (microcrystalline quartz)
Granite
Granite (a common rock type, not a single mineral species)
Chert (or Flint)
Chert (microcrystalline or cryptocrystalline quartz, SiO2)
Chert (Jasper-like)
SiO2 (Cryptocrystalline Quartz)
Chert / Flint (a variety of Chert)
Chert (SiO2)
Chert (or Flint)
Chert (a cryptocrystalline variety of quartz, SiO2)
Calcite
Calcite (Mineral; CaCO₃)
Quartzite
Quartzite
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Chert (or possibly Flint)
Chert (variant: Flint)
Biotite Schist
Biotite Schist
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
Gold
Aurum (Elemental Gold, Au)
Granite
Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)
Granite
Granite (a common term for a felsic intrusive igneous rock)
Chert (or Flint)
Silicon dioxide (SiO2)
Calcite
Calcite (CaCO3)
Chert Pebble (Jasperoid/Flint)
Silicon Dioxide (SiO2) - cryptocrystalline quartz
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Quartzite
Quartzite (primarily composed of SiO O₂)