Quartz
Silicon dioxide (SiO2)
Category
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
Quartz
Silicon dioxide (SiO2)
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Calcite
Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
Quartz (Milk/Citrine variety)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
White Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Milky Quartz
Silicon Dioxide (SiO2)
Green Calcite
Calcium Carbonate (CaCO3)
Peacock Ore (Chalcopyrite)
Chalcopyrite (CuFeS2)
Quartz
Silicon Dioxide (SiO2)
Quartz (Grain)
Silicon Dioxide (SiO2)
Quartz in Matrix
Silicon Dioxide (SiO2)
Pyrite in Matrix (likely Quartz or Coal)
Iron Sulfide (FeS2)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
Hematite
Iron(III) oxide (Fe2O3)
Blue Calcite
Calcite (CaCO3)
Clear Quartz Crystal
Quartz (Silicon Dioxide - SiO2)
Gneiss
Gneiss (Metamorphic high-grade)
Gneiss (River Cobble)
Gneiss (Foliated Metamorphic Rock)
Possible graphite-bearing schist
Graphitic mica schist; predominantly quartz, mica, and graphite
Gneiss
Gneiss
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
Gneiss (Metamorphic Rock)
Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)
Muscovite Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
Pyrite
Iron Sulfide (FeS2)
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
Feldspathic Gneiss
High-grade Metamorphic Rock (Gneiss)
Gneiss
High-grade metamorphic rock (Gneiss)
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)