Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
Category
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
Granite Gneiss
Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Orange Calcite
Calcium Carbonate (CaCO3)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
Gneiss
Gneiss
Gneiss
Gneiss (High-grade Metamorphic Rock)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Gneiss
Gneiss (Metamorphic high-grade)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
Hematite
Iron(III) oxide (Fe2O3)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Gneiss (River Cobble)
Gneiss (Foliated Metamorphic Rock)
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2)
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
Banded Agate
Chalcedony (Silicon Dioxide, SiO2)
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
Yellow Quartz (Citrine or Yellow Chalcedony)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Blue Lace Agate
Silicon Dioxide (SiO₂)
Orange Calcite
Calcium Carbonate (CaCO3)
Banded Chalcedony (Agate)
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Pyrite in Shale
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
Blue Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO₂)
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
Galena
Lead(II) Sulfide (PbS)
Greenstone
Greenschist / Meta-basalt
Milky Quartz
Silicon Dioxide (SiO2)
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Gneiss (Cobble)
Gneiss
Gneiss
High-grade Metamorphic Gneiss
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
Gneiss
Gneiss (High-grade regional metamorphic rock)
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)