Magnetite / Ironstone
Iron(II,III) oxide (Fe3O4)
Category
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
Magnetite / Ironstone
Iron(II,III) oxide (Fe3O4)
Clear Quartz
Silicon Dioxide (SiO2)
Potassium Feldspar
Orthoclase (KAlSi3O8)
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Orange Calcite
Calcium Carbonate (CaCO3)
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Calcite
Calcium Carbonate (CaCO3)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Agate
Silicon dioxide (SiO2) - Microcrystalline Quartz
Quartz
Quartz (Silicon Dioxide - SiO2)
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Pink Quartzite
Quartzite (SiO2 with iron oxide inclusions)
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
Quartzite
Quartzite (containing SiO2)
Banded Quartzite
Quartzite (primarily SiO2)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Gneiss
Gneiss
Gneissic River Pebble
Gneiss
Granite Gneiss with Garnet
Garnetiferous Gneiss
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Gneiss
Gneiss
Quartzite with inclusions
Quartzite (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Orange Quartzite (Tumbled)
Quartzite (SiO2)
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with Crocidolite or Magnesio-riebeckite inclusions
Marble
Recrystallized Calcite (CaCO3)
Anthracite Coal
Anthracite (Carbon based fossil fuel)
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)