Rock Identifier

Category

Mineraloid (Human Made Geological Specimen)

Browse mineraloid (human made geological specimen) specimens identified by the Rock Identifier community.

Amethyst (SiO2 (Silicon Dioxide with iron impurities)) — mineral

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

mineral
Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

mineral
Milky Quartz (Water-worn Pebble) (Quartz (Silicon Dioxide) - SiO2) — mineral

Milky Quartz (Water-worn Pebble)

Quartz (Silicon Dioxide) - SiO2

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

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Jasper (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

sedimentary
Auriferous Quartz with Pyrite (Gold-bearing Quartz (SiO2 + FeS2 + Au)) — mineral

Auriferous Quartz with Pyrite

Gold-bearing Quartz (SiO2 + FeS2 + Au)

mineral
Amazonite (Amazonite (KAlSi3O8, a variety of Microcline)) — mineral

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

mineral
Amethyst (Crystalline Quartz (SiO2 with iron impurities)) — mineral

Amethyst

Crystalline Quartz (SiO2 with iron impurities)

mineral
Weathered limestone or calcareous sandstone (Calcite-rich carbonate rock, chiefly calcium carbonate (CaCO₃), possibly fossiliferous limestone) — sedimentary

Weathered limestone or calcareous sandstone

Calcite-rich carbonate rock, chiefly calcium carbonate (CaCO₃), possibly fossiliferous limestone

sedimentary
Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

igneous
Quartz with Schorl (Black Tourmaline) (Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Quartz with Schorl (Black Tourmaline)

Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Basalt (Basalt (Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Extrusive Igneous Rock)

igneous
Granite Pebble (Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)) — igneous

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

igneous
Mineral and Rock Collection (Assorted) (Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine) — mineral

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

mineral
Unidentified Rock Fragment (Unknown) — Rock

Unidentified Rock Fragment

Unknown

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

Clear Quartz

Silicon Dioxide (SiO2)

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

Quartz (Clear/White)

Silicon Dioxide (SiO2)

mineral
Quartz with Tourmaline Inclusions (Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4) inclusions) — mineral

Quartz with Tourmaline Inclusions

Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4) inclusions

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Rutilated Quartz

Silicon Dioxide with Titanium Dioxide (SiO2 with TiO2 inclusions)

mineral
Blue Apatite (Apatite-(CaF), Ca5(PO4)3F) — mineral

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F

mineral
Chalcedony (Common Opal variant) (Silicon dioxide (SiO2) with microcrystalline structure) — mineral

Chalcedony (Common Opal variant)

Silicon dioxide (SiO2) with microcrystalline structure

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary
Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

sedimentary
Likely weathered quartz-bearing rock fragment (Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite) — mineral

Likely weathered quartz-bearing rock fragment

Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite

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

Clear Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

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

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Quartz Geode Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode Pebble

Silicon Dioxide (SiO2)

sedimentary
Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

mineral
Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral