Rock Identifier

Category

Mineraloid (Man Made Origin)

Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Rainbow Fluorite (Calcium Fluoride (CaF2)) — mineral

Rainbow Fluorite

Calcium Fluoride (CaF2)

Red Jasper (Quartzite conglomerate) (Silicon dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper (Quartzite conglomerate)

Silicon dioxide (SiO2) with Iron inclusions

Rose Quartz (Rose Quartz (Silicon Dioxide, SiO2)) — mineral

Rose Quartz

Rose Quartz (Silicon Dioxide, SiO2)

Jasper (Jasper (SiO2)) — sedimentary

Jasper

Jasper (SiO2)

Limonite (Limonite (FeOO·nH2O)) — mineral

Limonite

Limonite (FeOO·nH2O)

Dark Igneous Rock (Likely Basalt or Diabase) (Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.) — Igneous

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Pink Dyed Agate (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Moss Agate (Silicon Dioxide (SiO2) with mineral inclusions) — Mineral

Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Granite (Phaneritic plutonic igneous rock (mostly SiO2 and Al2O3)) — igneous

Granite

Phaneritic plutonic igneous rock (mostly SiO2 and Al2O3)

Quartzite with Iron Inclusions (Quartzite (primarily SiO2 with Fe2O3 impurities)) — metamorphic

Quartzite with Iron Inclusions

Quartzite (primarily SiO2 with Fe2O3 impurities)

Dendritic Quartz (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Sandstone (likely Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (likely Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Jasper pebble (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper pebble

Jasper (Silicon Dioxide, SiO2)

Chert (with Chalky Cortex) (Silicon Dioxide (SiO2)) — sedimentary

Chert (with Chalky Cortex)

Silicon Dioxide (SiO2)

Yellow Agate (Agate (Microcrystalline Silicon Dioxide, SiO2)) — mineral

Yellow Agate

Agate (Microcrystalline Silicon Dioxide, SiO2)

Granitic Gneiss (Gneiss (Polymetamorphic Granitic Gneiss)) — metamorphic

Granitic Gneiss

Gneiss (Polymetamorphic Granitic Gneiss)

Ferruginous Quartz (Red Jasper/Carnelian Agate) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Ferruginous Quartz (Red Jasper/Carnelian Agate)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Jasper (Yellow/Brown variety) (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Jasper (Yellow/Brown variety)

Silicon Dioxide (SiO2) with iron oxide impurities

Hematite (beads) (Hematite (Fe₂O₃)) — Mineral

Hematite (beads)

Hematite (Fe₂O₃)

Sandstone (likely Graywacke or Arkose variant) (Clastic Sedimentary Rock (Lithic Sandstone)) — sedimentary

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

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

Quartz Crystal Point

Silicon Dioxide (SiO2)

Porphyry (Porphyritic Basalt/Andesite) — igneous

Porphyry

Porphyritic Basalt/Andesite

Mica Schist (Mica Schist (contains Muscovite/Biotite, Quartz)) — metamorphic

Mica Schist

Mica Schist (contains Muscovite/Biotite, Quartz)

Moss Agate (Chalcedony (SiO2) with inclusions of manganese or iron oxide) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxide

Quartz (Citrine or Iron-Stained variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Iron-Stained variety)

Silicon Dioxide (SiO2)

Feldspar (specifically Orthoclase) (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Dendritic Agate (Tumbled) (Silicon Dioxide (SiO2) with inclusions) — mineral

Dendritic Agate (Tumbled)

Silicon Dioxide (SiO2) with inclusions

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

Quartz (Milky/Gray variety)

Silicon Dioxide (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Agate Geode (Unopened) (Cryptocrystalline Quartz (SiO2) with Chalcedony) — mineral

Agate Geode (Unopened)

Cryptocrystalline Quartz (SiO2) with Chalcedony

Bort or Carbonado (C - Polycrystalline Diamond) — mineral

Bort or Carbonado

C - Polycrystalline Diamond

Turquoise, Pearl, and Coral Necklace (CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)) — mineral

Turquoise, Pearl, and Coral Necklace

CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)

Red Scoria (Lava Rock) (Scoria (highly vesicular basaltic/andesitic rock)) — igneous

Red Scoria (Lava Rock)

Scoria (highly vesicular basaltic/andesitic rock)

Dalmatian Stone (Peralkaline Quartz-Feldspar Rock) — igneous

Dalmatian Stone

Peralkaline Quartz-Feldspar Rock

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Ferruginous Sandstone (Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)) — sedimentary

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Peridotite (Peridotite (Ultramafic Rock)) — igneous

Peridotite

Peridotite (Ultramafic Rock)

Dendritic Agate (Chalcedony (SiO2) with manganese/iron oxide inclusions) — mineral

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions