Rock Identifier

Category

Mineral (Processed Alloy)

Browse mineral (processed alloy) specimens identified by the Rock Identifier community.

Green Tourmaline (Verdelite) (Elbaite (Complex Borosilicate: Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)) — mineral

Green Tourmaline (Verdelite)

Elbaite (Complex Borosilicate: Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Milky Quartz / Quartzite)

Silicon Dioxide (SiO2)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Yellow Quartz (Iron-Stained Quartz) (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Yellow Quartz (Iron-Stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Specularite (Specular Hematite) (Iron Oxide (Fe2O3)) — mineral

Specularite (Specular Hematite)

Iron Oxide (Fe2O3)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide with Iron Oxide (SiO2 with traces of Fe2O3/FeO(OH))) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide with Iron Oxide (SiO2 with traces of Fe2O3/FeO(OH))

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

Rock Crystal Quartz Pebble

Silicon Dioxide (SiO2)

Dolomite on Prehnite (Saddle-shaped Dolomite) (Dolomite [CaMg(CO3)2] on Prehnite [Ca2Al(AlSi3O10)(OH)2]) — mineral

Dolomite on Prehnite (Saddle-shaped Dolomite)

Dolomite [CaMg(CO3)2] on Prehnite [Ca2Al(AlSi3O10)(OH)2]

Opalite (Synthetic Glass (Simulated Opal)) — mineral

Opalite

Synthetic Glass (Simulated Opal)

Ferruginous Sandstone (Gozzan-like) (Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)) — sedimentary

Ferruginous Sandstone (Gozzan-like)

Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)

Quartz on Host Rock (Silicon Dioxide (SiO2)) — Mineral Specimen

Quartz on Host Rock

Silicon Dioxide (SiO2)

Mineral Specimen

Marble (Recrystallized Calcite Rock (CaCO3)) — metamorphic

Marble

Recrystallized Calcite Rock (CaCO3)

Sandstone (Ferruginous) (Arenite (with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with iron oxide cement)

Unidentifiable Rock Fragment — Uncertain

Unidentifiable Rock Fragment

Sea Glass (Frosted Quartz/Glass) (Amorphous Silicon Dioxide (SiO2)) — Mineraloid

Sea Glass (Frosted Quartz/Glass)

Amorphous Silicon Dioxide (SiO2)

Goldstone (Red) (Aventurine Glass (Cupriferous glass)) — Synthetic Glass (Man-made)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Synthetic Glass (Man-made)

Green Aventurine (Fuchsite-bearing Quartz) (Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine (Fuchsite-bearing Quartz)

Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Quartz Druze on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Limonite (with Goethite/Ironstone) (FeO(OH)·nH2O (Hydrated Iron Oxide)) — mineral

Limonite (with Goethite/Ironstone)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Green Aventurine (Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Gneiss (specifically a granitic gneiss cobble) (Gneiss (high-grade regional metamorphic rock)) — metamorphic

Gneiss (specifically a granitic gneiss cobble)

Gneiss (high-grade regional metamorphic rock)

Red Shale (Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)) — sedimentary

Red Shale

Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)

Zirconia (Ceramic) & Ion-X Glass (Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass) — Synthetic Mineral / Glass

Zirconia (Ceramic) & Ion-X Glass

Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass

Synthetic Mineral / Glass

Snowflake Obsidian (Volcanic glass containing Cristobalite (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Cristobalite (SiO2)

Biotite Schist (likely) (Biotite Schist (rock), Biotite (mineral)) — Metamorphic

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Banded Agate / Lace Agate (Agate (Silica/Quartz) - SiO2) — mineral

Banded Agate / Lace Agate

Agate (Silica/Quartz) - SiO2

Granite (Granite (a common term for a felsic intrusive igneous rock)) — igneous

Granite

Granite (a common term for a felsic intrusive igneous rock)

Gneiss (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade regional metamorphic rock)

Yellow Quartz (Citrine/Lemon Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Lemon Quartz)

Silicon Dioxide (SiO2)

Tiger's Eye (Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)) — Mineral

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Amethyst Lace Agate / Banded Amethyst (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst Lace Agate / Banded Amethyst

Silicon Dioxide (SiO2) with Fe3+ impurities

Green Aventurine (Double-Terminated Wand) (Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)) — mineral

Green Aventurine (Double-Terminated Wand)

Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)

Opalite (Man-made Synthetic Glass (Silicon Dioxide with metal additives)) — mineral

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Carnelian (Carnelian (variety of Chalcedony, SiO2)) — mineral

Carnelian

Carnelian (variety of Chalcedony, SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Hematite/Limonite) inclusions

Schorl (Black Tourmaline) (Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Schorl (Black Tourmaline)

Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)