Rock Identifier

Category

Organic (Paper And Cellulose)

Browse organic (paper and cellulose) specimens identified by the Rock Identifier community.

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

sedimentary
Quartz (Milky/Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

mineral
Rutilated Quartz (Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)) — mineral

Rutilated Quartz

Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)

mineral
Chert / Flint (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or cryptocrystalline quartz (SiO2)

sedimentary
Ferruginous Quartz Cobble (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Ferruginous Quartz Cobble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

mineral
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Magnetite (likely in Hematite or Ironstone) (Magnetite (Fe3O4)) — mineral

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

mineral
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Olivine (Magnesium Iron Silicate ((Mg, Fe)₂SiO₄)) — mineral

Olivine

Magnesium Iron Silicate ((Mg, Fe)₂SiO₄)

mineral
Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

mineral
Pyrite and Sunstone (Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)) — mineral

Pyrite and Sunstone

Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)

mineral
Sandstone (Arenite (Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Sedimentary Rock)

sedimentary
Sandstone (Micaceous) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

sedimentary
One Pound Coin (UK) (Nickel-Brass Alloy (Cu-Zn-Ni)) — mineral

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

mineral
Aquamarine with Ruby Accent (Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)) — mineral

Aquamarine with Ruby Accent

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

mineral
Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

sedimentary
Rose Quartz (Silicon dioxide (SiO2)) — mineral

Rose Quartz

Silicon dioxide (SiO2)

mineral
Herkimer Diamond (Quartz Crystal) (Silicon Dioxide (SiO2)) — mineral

Herkimer Diamond (Quartz Crystal)

Silicon Dioxide (SiO2)

mineral
Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Sandstone (Quartzose) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

sedimentary
Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

mineral
Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

mineral
Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

mineral
Quartzite with Quartz Vein (Quartzite (primarily SiO2)) — metamorphic

Quartzite with Quartz Vein

Quartzite (primarily SiO2)

metamorphic
Quartzite Pebble (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartz (SiO2)

metamorphic
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral
White Moonstone (Feldspar) (Potassium aluminum silicate (KAlSi3O8)) — mineral

White Moonstone (Feldspar)

Potassium aluminum silicate (KAlSi3O8)

mineral
Yellow Quartzite (Quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

metamorphic
Rhodonite (Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

mineral
Lapis Lazuli (Lazurite-rich metamorphic rock; (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2) — metamorphic

Lapis Lazuli

Lazurite-rich metamorphic rock; (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

metamorphic
Quartz (Druzy) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy)

Silicon Dioxide (SiO2)

mineral
Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Spessartine Garnet (Manganese aluminum silicate (Mn2+3Al2(SiO4)3)) — mineral

Spessartine Garnet

Manganese aluminum silicate (Mn2+3Al2(SiO4)3)

mineral
Lapis Lazuli (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2) — metamorphic

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

metamorphic