Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Metamorphic
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
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Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Tumbled/Water-worn)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Quartz (Rosy/Clear variety)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Greenstone (Metabalt)
Chlorite schist / Epidiorite
metamorphic
Quartzite (River Pebble)
Metamorphosed Sandstone (SiO2)
metamorphic
Dragon Blood Jasper
Epidote with Red Jasper (Quartz-rich aggregate)
sedimentary
Anthracite Coal
Anthracite
sedimentary
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Banded Gneiss and Siltstone River Stones
Gneiss (High-grade Metamorphic Rock)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Gneiss
High-grade foliated metamorphic rock
metamorphic
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
metamorphic
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Orange Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Quartzite (River Cobble)
Quartzite (primarily SiO2)
metamorphic
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
metamorphic
Gneiss
Gneiss
metamorphic
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
mineral
Banded gneiss, probably granitic gneiss
Foliated gneiss composed mainly of quartz (SiO₂), feldspar—orthoclase/microcline and plagioclase—and dark mica, commonly biotite K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂
metamorphic
Quartz crystal
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (Quartz variety), SiO2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral