Rock Identifier

Category

Basalt

Browse basalt specimens identified by the Rock Identifier community.

Labradorite ((Ca, Na)(Al, Si)4O8) — mineral

Labradorite

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

Carnelian Agate (Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony) — Mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony

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

Blue Lace Agate

Silicon Dioxide (SiO2)

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

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Banded Agate (Silicon Dioxide (SiO2)) — mineral

Banded Agate

Silicon Dioxide (SiO2)

Bauxite (Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))) — sedimentary

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))

Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Agate

Cryptocrystalline Quartz (SiO2)

Banded Agate (often called Brown Agate or Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (often called Brown Agate or Chalcedony)

Silicon Dioxide (SiO2)

Epidote (Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — mineral

Epidote

Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

Greenschist (Chlorite schist) — metamorphic

Greenschist

Chlorite schist

Ruby (Corundum) (Aluminum Oxide (Al2O3) with Chromium traces) — mineral

Ruby (Corundum)

Aluminum Oxide (Al2O3) with Chromium traces

Mixed Tumbled Stones Collection (Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)) — multiple

Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Amethyst on Agate/Basalt Matrix (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst on Agate/Basalt Matrix

Silicon Dioxide (SiO2) with iron impurities

Carnelian (Carnelian (Silicon Dioxide, SiO2)) — mineral

Carnelian

Carnelian (Silicon Dioxide, SiO2)

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

Amethyst (Tumbled)

Silicon Dioxide with iron impurities (SiO2)

Chalcedony (Botryoidal/Drusy Quartz) (Silicon Dioxide (SiO₂)) — Mineral

Chalcedony (Botryoidal/Drusy Quartz)

Silicon Dioxide (SiO₂)

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Epidosite (Epidote-rich rock) (Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))) — metamorphic

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Larimar (Pectolite (a variety of pectolite, NaCa2Si3O8(OH))) — Mineral

Larimar

Pectolite (a variety of pectolite, NaCa2Si3O8(OH))

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

Olivine (Peridot)

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

Peridot (Olivine ((Mg,Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg,Fe)2SiO4)

Basalt with Olivine Phenocrysts (Porphyritic Basalt (with (Mg, Fe)2SiO4)) — igneous

Basalt with Olivine Phenocrysts

Porphyritic Basalt (with (Mg, Fe)2SiO4)

Ferrous Slag (Iron Smelting By-product) (Fused Siliceous Slag) — Anthropogenic Material (Man-made Rock)

Ferrous Slag (Iron Smelting By-product)

Fused Siliceous Slag

Anthropogenic Material (Man-made Rock)

Porphyritic Basalt (or Andesite) Pebble (Porphyritic Mafic Volcanic Rock) — igneous

Porphyritic Basalt (or Andesite) Pebble

Porphyritic Mafic Volcanic Rock

Granite and Igneous Mix (Phaneritic Felsic to Mafic Intrusive Rocks) — igneous

Granite and Igneous Mix

Phaneritic Felsic to Mafic Intrusive Rocks

Olivine (Peridotite) (Olivine Group; (Mg, Fe)2SiO4) — igneous

Olivine (Peridotite)

Olivine Group; (Mg, Fe)2SiO4

Banded Agate (Orca Agate) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate (Orca Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

White Agate (Chalcedony) (Chalcedony (SiO2)) — mineral

White Agate (Chalcedony)

Chalcedony (SiO2)

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

Peridot

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

Ruby (Corundum (Al2O3 with Chromium impurities)) — mineral

Ruby

Corundum (Al2O3 with Chromium impurities)

Greenstone (Metabasalt / Chlorite-Epidote Schist) — metamorphic

Greenstone

Metabasalt / Chlorite-Epidote Schist

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

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Eclogite garnet in matrix (Eclogite (Garnet-Omphacite rock)) — metamorphic

Eclogite garnet in matrix

Eclogite (Garnet-Omphacite rock)

Amethyst (Faceted) (Quartz (SiO2) with iron impurities) — Mineral

Amethyst (Faceted)

Quartz (SiO2) with iron impurities

Carnelian Agate (Silicon Dioxide (SiO₂)) — mineral

Carnelian Agate

Silicon Dioxide (SiO₂)

Labradorite (Labradorite ((Ca,Na)(Al,Si)4O8)) — mineral

Labradorite

Labradorite ((Ca,Na)(Al,Si)4O8)

Quartz on Greenstone (Silicon Dioxide (SiO2) on Altered Igneous Geologic Unit) — metamorphic

Quartz on Greenstone

Silicon Dioxide (SiO2) on Altered Igneous Geologic Unit