Rock Identifier

Category

Non Geological

Browse non geological specimens identified by the Rock Identifier community.

Pyrite in Shaly Matrix (Iron Sulfide (FeS2)) — mineral

Pyrite in Shaly Matrix

Iron Sulfide (FeS2)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Yellow Chalcedony (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony

Silicon Dioxide (SiO2)

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

Yellow Quartz (Citrine/Gold Quartz)

Silicon Dioxide (SiO2)

Moss Agate and Hematite (Silica (SiO2) with fibrous inclusions of Manganese or Iron; Hematite (Fe2O3)) — mineral

Moss Agate and Hematite

Silica (SiO2) with fibrous inclusions of Manganese or Iron; Hematite (Fe2O3)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Diorite (River Pebble) (Intermediate plutonic igneous rock) — igneous

Diorite (River Pebble)

Intermediate plutonic igneous rock

Pebble or Cobble (likely composed of sandstone or conglomerate) (Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)) — Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)

Pebble or Cobble (likely composed of sandstone or conglomerate)

Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)

Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx') (Calcite (CaCO3)) — sedimentary

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (CaCO3)

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Apache Tear (Hydrated Obsidian (Natural Volcanic Glass)) — igneous

Apache Tear

Hydrated Obsidian (Natural Volcanic Glass)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Sphalerite with Galena (Zinc Sulfide ((Zn,Fe)S) and Lead Sulfide (PbS)) — mineral

Sphalerite with Galena

Zinc Sulfide ((Zn,Fe)S) and Lead Sulfide (PbS)

Obsidian (Amorphous volcanic glass (SiO2)) — igneous

Obsidian

Amorphous volcanic glass (SiO2)

Tufa (Vesicular Limestone) (Tufa (form of Calcium Carbonate, CaCO3)) — sedimentary

Tufa (Vesicular Limestone)

Tufa (form of Calcium Carbonate, CaCO3)

Charoite (Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)) — metamorphic

Charoite

Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)

Quartz (Milky or Grainy Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Grainy Variety)

Silicon Dioxide (SiO2)

Basalt (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Hematite (Hematite (Fe2O3)) — Mineral

Hematite

Hematite (Fe2O3)

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

Quartz / Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Rhodonite, Gray Moonstone, and White Feldspar Mix (Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)) — mineral

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)

Rose Quartz with Feldspar Inclusions (Silicon Dioxide (SiO2)) — mineral

Rose Quartz with Feldspar Inclusions

Silicon Dioxide (SiO2)

Granite (Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Pyrite in Matrix (Commonly called Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (Commonly called Fool's Gold)

Iron Sulfide (FeS2)

Smoky Quartz (with Iron Oxidation) (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz (with Iron Oxidation)

Silicon Dioxide (SiO2)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Galena (Lead(II) sulfide (PbS)) — mineral

Galena

Lead(II) sulfide (PbS)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Beryl (Emerald Variety) (Beryllium Aluminum Silicate (Be3Al2(SiO3)6)) — mineral

Beryl (Emerald Variety)

Beryllium Aluminum Silicate (Be3Al2(SiO3)6)

Travertine (Terrestrial Sedimentary Form of Calcium Carbonate (CaCO3)) — sedimentary

Travertine

Terrestrial Sedimentary Form of Calcium Carbonate (CaCO3)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

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

Rhodonite

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

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

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Chert (often referred to as Flint or Jasper when pigmented) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often referred to as Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Sandstone (Quartzite-rich Pebble) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzite-rich Pebble)

Arenite (composed primarily of SiO2)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

Sandstone (likely Calcareous or Quartz-rich) (Arenite (SiO2 based typically)) — sedimentary

Sandstone (likely Calcareous or Quartz-rich)

Arenite (SiO2 based typically)

Muscovite Mica (Muscovite - KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2