Faceted Clear Quartz or Diamond Simulant
Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic
gemstone
Category
Igneous, Sedimentary, And Metamorphic
Browse igneous, sedimentary, and metamorphic specimens identified by the Rock Identifier community.
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Pyrite
Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Rock
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate, CaCO3
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Likely quartz-rich pebble fragment
Quartz (SiO₂), possibly milky quartz or quartzite; the photo is insufficient to distinguish them confidently
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Agate/Jasper pebble)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Magnetite Orthorthotropic Rock
Magnetite (Fe3O4)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz-bearing granite or pegmatite fragment
Likely granitic material composed mainly of quartz (SiO₂), feldspar, and possibly biotite or hornblende
igneous
Limonite pseudomorph after pyrite
Goethite / Limonite pseudomorph after Pyrite (Fe3+O(OH) replacing FeS2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral