Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Chalcedony (Agate/Blue Quartzite)
Silicon Dioxide (SiO2)
mineral
Chalcedony (River Stone)
Microcrystalline Quartz (SiO2)
mineral
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Chalcedony
Cryptocrystalline Quartz (SiO2)
Mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Amphibolite Gneiss)
Gneiss
metamorphic
River Stone (likely Siltstone or fine-grained Basalt)
Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)
sedimentary or igneous
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
igneous and sedimentary mixture
Green Moss Agate / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions
sedimentary
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)
mineral
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Gneiss (Pebble)
Gneiss
metamorphic
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss (with Quartzite and Mica)
Gneiss
metamorphic
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Gneiss
Gneiss
metamorphic
White Agate (Chalcedony)
Agate (Silicon Dioxide - SiO2)
mineral
Gneiss
Gneiss
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Mineral
Quartz (Clear/White)
Silicon Dioxide (SiO2)
mineral
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
mineral