Smoky Quartz
Silicon Dioxide (SiO2)
Category
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
Lavender Quartz (appearing as beads) and Druzy Quartz
Silicon Dioxide (SiO2)
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
Quartz Sand Gravel
Silicon Dioxide (SiO2)
River Stone (likely Siltstone or fine-grained Basalt)
Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)
Seashell Fragment
Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite
Sandstone
Arenite (primarily SiO2)
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
Chert (or potentially Jasper/Chalcedony)
SiO2 (Silicon Dioxide)
Chert (Jasper-like Silicate)
Microcrystalline Quartz (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 principal)
Sandstone (with potential iron mineralization)
Arenite
Gneiss
Gneiss
Gneiss
Gneiss (Metamorphic rock dominated by Quartz, Feldspar, and various dark minerals)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
High-grade metamorphic rock (Gneiss)
Gneiss
Gneiss
Gneiss
Gneiss
Greenstone / Graywacke
Metagraywacke or Chlorite Schist
Gneiss
Gneiss
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
Gneiss (foliated metamorphic rock)
Gneiss
Gneiss
Gneiss
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Fluorite
Fluorite (Calcium Fluoride, CaF2)
Graphite
Graphite (Chemical Formula: C)
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
Gneiss
Gneiss (Metamorphic Rock)
Schist
Mica Schist
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Yellow Calcite
Calcium Carbonate (CaCO3)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky/Rose variety)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Gneiss
Gneiss
Quartz (Milky/Smoky Crystal fragment)
Silicon Dioxide (SiO2)
Banded Gneiss
Gneiss
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock