Pyrite-bearing rock, possibly pyrite schist or sulfide ore
Pyrite (iron disulfide, FeS₂), likely intergrown with dark metamorphic host minerals
mineral
Category
Sedimentary And Metamorphic
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
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Iron-stained weathered rock
Unknown
Unknown (likely sedimentary or metamorphic)
Clear Quartz
Silicon dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Small quartz crystal fragment
Quartz, SiO₂
mineral
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
Mineral
White Buffalo Turquoise (or Howlite/Magnesite)
Calcite/Dolomite or Magnesite with Chert/Quartz inclusions
gemstone
Metallic sulfide-rich rock, possibly pyrite-bearing schist or marcasite specimen
Likely pyrite (FeS₂) in a foliated host rock; exact identification requires testing
metamorphic
Calcite crystal
Calcite (CaCO₃)
mineral
Agate
SiO2 (Chalcedony/Quartz)
sedimentary
Gravel (Crushed Stone Aggregates)
Mixed Siliciclastic / Carbonate Aggregate
sedimentary
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Pyrite
Iron Pyrite (FeS2)
mineral
White quartz bead strand
Quartz, silicon dioxide (SiO₂), likely milky or translucent quartz; beads are polished and drilled
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky / Massive Quartz)
Silicon Dioxide (SiO2)
mineral
Polished hematite bead (probable)
Hematite, Fe₂O₃
mineral
Likely pyrite-bearing rock
Pyrite (FeS₂), possibly in a quartz- or sulfide-rich matrix
mineral
Gravel / Small Pebble
Rock Fragment (Gravel)
sedimentary
Red Jasper
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz, likely milky or smoky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Agate
Chalcedony (SiO2)
sedimentary
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz-rich rock, possibly milky quartz or quartzite fragment
Quartz (SiO₂), potentially quartzite if metamorphic
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Pyrite-bearing rock (likely pyrite-rich schist or massive pyrite)
Pyrite, FeS₂, possibly in a micaceous metamorphic matrix
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Zoisite with Hornblende
Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions
metamorphic
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
mineral