Rock Identifier

Category

Mineraloid (Human Made Geological Specimen)

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

Red Jasper (Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

sedimentary
Sunstone (Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)) — mineral

Sunstone

Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

mineral
Devil's Toenail (Fossil Oyster) (Gryphaea arcuata (Calcium Carbonate, CaCO3)) — sedimentary

Devil's Toenail (Fossil Oyster)

Gryphaea arcuata (Calcium Carbonate, CaCO3)

sedimentary
Calcite (Yellow/Orange variety - sometimes called Honey Calcite) (Calcite) — Mineral

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Mineral
Granite (Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)) — igneous

Granite

Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)

igneous
Amethyst (Silicon Dioxide with Iron impurities (SiO2)) — mineral

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

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

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

sedimentary
Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

mineral
Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Mineral
Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

mineral
Quartz (likely Milky Quartz) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Mineral
Sandstone Beach Pebble (Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)) — sedimentary

Sandstone Beach Pebble

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)

sedimentary
Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Granodiorite (Riverbed Cobble) (Granodiorite) — igneous

Granodiorite (Riverbed Cobble)

Granodiorite

igneous
Orange Calcite (Calcite (Calcium Carbonate - CaCO3)) — mineral

Orange Calcite

Calcite (Calcium Carbonate - CaCO3)

mineral
River Pebble (Gneiss or Quartzite variant) (Course-grained Metamorphic Rock (likely SiO2 dominant)) — metamorphic

River Pebble (Gneiss or Quartzite variant)

Course-grained Metamorphic Rock (likely SiO2 dominant)

metamorphic
Chert (Honey Chert / Flint) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

sedimentary
N/A (Non-Geological Object) — N/A

N/A (Non-Geological Object)

N/A
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Bored Siltstone (Holey Rock) (Siltstone with Pholad borings (Lithophaga/Pholadidae trace fossils)) — sedimentary

Bored Siltstone (Holey Rock)

Siltstone with Pholad borings (Lithophaga/Pholadidae trace fossils)

sedimentary
Coquina (Biogenic Limestone (CaCO3)) — sedimentary

Coquina

Biogenic Limestone (CaCO3)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

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

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Citrine (Iron-stained Quartz)

Silicon Dioxide (SiO2)

mineral
Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

sedimentary
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Rough Quartz (Iron-stained)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Basalt (Drill Core) (Mafic Volcanic Rock (Basalt)) — igneous

Basalt (Drill Core)

Mafic Volcanic Rock (Basalt)

igneous
Yellow Chalcedony (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony

Silicon Dioxide (SiO2)

mineral
Blue Chalcedony (Blue Lace Agate variety) (Silicon Dioxide (SiO₂)) — mineral

Blue Chalcedony (Blue Lace Agate variety)

Silicon Dioxide (SiO₂)

mineral
Aura Quartz (Titanium-coated Silicon Dioxide (SiO2)) — mineral

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

mineral
Granite Cobble (Plutonic Igneous Rock (Granitic)) — igneous

Granite Cobble

Plutonic Igneous Rock (Granitic)

igneous
Amethyst (Silicon Dioxide (SiO2)) — mineral

Amethyst

Silicon Dioxide (SiO2)

mineral