River Quartz Pitting/Cobble
Silicon Dioxide (SiO2)
Category
Browse mineral with metamorphic or igneous host specimens identified by the Rock Identifier community.
River Quartz Pitting/Cobble
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz Pebble (with probable iron staining)
Silicon dioxide (SiO2)
Agate
Silicon Dioxide (SiO2) - Chalcedony variant
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Orange Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Quartz (Iron-Stained Quartz Pebble)
Silicon Dioxide (SiO2)
Rough Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Quartz (Peach/Orange variety)
Silicon Dioxide (SiO2)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Citrine
Silicon Dioxide (SiO2) with ferric iron impurities
Ruby
Corundum (Al2O3 with Chromium)
Ironstone Concretion
Limonitic/Hematitic Concretion
Turquoise
Hydrous phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Quartz
SiO₂ (Silicon Dioxide)
Granite Gneiss
Gneiss (quartz-feldspar dominated)
Granite Gneiss
Felsic Gneiss
Banded Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (High-grade Regional Metamorphism)
Geode with Quartz and possibly Jasper/Hematite
Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides
Greenstone
Greenschist / Greenstone (Chlorite-Epidote facies)
Greenstone / Greenschist
Greenschist (composed primarily of Chlorite, Epidote, and Actinolite)
Gneiss
Gneiss
Graphite
Graphite (Chemical Formula: C)
Schist
N/A (a rock type, not a mineral formula)
Sandstone with Quartz Veins
Arenite (primarily SiO2 with Fe2O3 staining)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Black Tourmaline (Schorl)
NaFe3Al6(BO3)3Si6O18(OH)4
Foliated Gneiss (River-Worn Pebble)
Gneiss (High-grade Regional Metamorphic Rock)
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
Ruby in Zoisite
Anyolite (composite of Corundum and Zoisite)
Greenstone / Metabasalt
Metamorphosed Mafic Rock (Greenschist facies)
Greenstone
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Agate
Cryptocrystalline Quartz (SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities