Rock Identifier

Category

Igneous Or Sedimentary

Browse igneous or sedimentary specimens identified by the Rock Identifier community.

Learn about Igneous Or Sedimentary in the encyclopedia

Carbonatite

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Lamproite

Troctolite

Basalt

Gabbro

Kimberlite

Diorite

Coal

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Magnetic Sand Grain / Magnetite Pellet (Magnetite (Fe3O4)) — mineral

Magnetic Sand Grain / Magnetite Pellet

Magnetite (Fe3O4)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Garnet (specifically Almandine) (Almandine - Fe3Al2(SiO4)3) — metamorphic

Garnet (specifically Almandine)

Almandine - Fe3Al2(SiO4)3

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

Quartz (Granular)

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Dalmatian Stone (Peralkaline Feldsphathic Igneous Rock) — igneous

Dalmatian Stone

Peralkaline Feldsphathic Igneous Rock

Possible magnetite fragment (Magnetite (Fe₃O₄), tentative identification) — mineral

Possible magnetite fragment

Magnetite (Fe₃O₄), tentative identification

Likely weathered sandstone or iron-stained sedimentary rock (Quartz-rich sandstone; exact identification is limited by the blurred photograph) — sedimentary

Likely weathered sandstone or iron-stained sedimentary rock

Quartz-rich sandstone; exact identification is limited by the blurred photograph

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

Milky Quartz in Matrix

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Fossilized shell fragment (Indeterminate fossil mollusk; likely a silicified or mineral-replaced bivalve/gastropod fragment) — fossil

Fossilized shell fragment

Indeterminate fossil mollusk; likely a silicified or mineral-replaced bivalve/gastropod fragment

Yellow chalcedony or quartz fragment (Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)) — mineral

Yellow chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)

Purple Dyed Dalmatian Stone (Dyed Peralkaline Trachyte) — igneous

Purple Dyed Dalmatian Stone

Dyed Peralkaline Trachyte

Dalmation Stone (Peralkaline Rock (Microcline Quartz mixture with Arfvedsonite)) — igneous

Dalmation Stone

Peralkaline Rock (Microcline Quartz mixture with Arfvedsonite)

Dalmation Stone (Peralkaline Rock (SiO2 with Arfvedsonite)) — igneous

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Magnetite (Magnetite (Iron(II,III) oxide, Fe3O4)) — mineral

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Rounded gray sandstone or siltstone cobble (Lithified quartz–feldspar–clay sediment; exact petrographic identification requires testing) — sedimentary

Rounded gray sandstone or siltstone cobble

Lithified quartz–feldspar–clay sediment; exact petrographic identification requires testing

Red Garnet (likely Almandine or Pyrope) (Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)) — mineral

Red Garnet (likely Almandine or Pyrope)

Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)

Dalmation Stone (Dalmation Jasper) (Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)) — igneous

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Fossilized marine shell fragment (Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)) — fossil

Fossilized marine shell fragment

Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)

Milky Quartz (SiO2) — mineral

Milky Quartz

SiO2

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Calcite on Matrix (Calcium Carbonate (CaCO3)) — mineral

Calcite on Matrix

Calcium Carbonate (CaCO3)