Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
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Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Peach/Orange)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Optical Calcite
CaCO3 (Calcium Carbonate)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode Cluster (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Onyx (Green Onyx)
Banded Calcite or Travertine (CaCO3)
Sedimentary
Banded iron formation (ironstone)
BIF; alternating hematite/magnetite and chert (SiO₂) layers
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Psilomelane (Black Hematite varietal)
Barium Manganese Oxide (Ba,H2O)2Mn5O10
mineral
Banded iron formation fragment (likely hematite–magnetite ironstone)
BIF; chiefly hematite (Fe₂O₃), magnetite (Fe₃O₄), and silica as microcrystalline quartz (SiO₂)
sedimentary
Chert
Silicon dioxide (SiO2)
sedimentary
Chert or Flint
Silicon dioxide (SiO2)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Gold Ore
Native Gold (Au)
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcite (CaCO₃), likely crystalline limestone or marble fragment
mineral
Tumbled quartz-rich stone, likely marble or calcite
Calcite (CaCO₃), possibly marble
metamorphic
Chert (Flint / Jasper / Hornstone)
Microcrystalline Quartz (SiO2)
sedimentary
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Sandstone (Ferruginous)
Arenite (SiO2 based with Fe2O3 banding)
sedimentary
Blue apatite (likely dyed or enhanced)
Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Hematite
Hematite, Iron(III) oxide (Fe2O3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
White quartz-rich rock, likely milky quartz or quartzite
Quartz (SiO₂); possibly quartzite, a metamorphosed quartz sandstone
metamorphic
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary