Rock Identifier

Category

Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

Smoky Quartz

Magnetite

Clear Obsidian

Basalt (River Stone) (Basalt) — igneous

Basalt (River Stone)

Basalt

Fluorite Tower (Fluorite (Calcium Fluoride - CaF2)) — mineral

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

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

Quartz (Milky/Vein Quartz)

Silicon Dioxide (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

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

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

Calcite

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Basalt (River Stone) (Basalt) — igneous

Basalt (River Stone)

Basalt

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

Quartz (Quartzite)

Silicon Dioxide (SiO2)

Granodiorite (Granodiorite (Intermediate intrusive igneous rock)) — igneous

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Carborundum (Silicon Carbide) (Silicon Carbide (SiC)) — mineral

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Fossiliferous Limestone (Biogenic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (CaCO3)

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Jasper (likely Brecciated or Multi-colored) (Jasper (SiO2)) — sedimentary

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Blue Lace Agate (Silicon Dioxide (SiO2) with Chalcedony structure) — mineral

Blue Lace Agate

Silicon Dioxide (SiO2) with Chalcedony structure

Banded Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Banded Jasper

Silicon Dioxide (SiO2) with impurities

Jasper with Quartz Veins (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Quartz Veins

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Stromatolite (Biogenic Sedimentary Rock (Precambrian Stromatolite fossil)) — sedimentary

Stromatolite

Biogenic Sedimentary Rock (Precambrian Stromatolite fossil)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Yellow Quartz (Yellow Aventurine) (Silicon Dioxide (SiO2) with inclusions) — mineral

Yellow Quartz (Yellow Aventurine)

Silicon Dioxide (SiO2) with inclusions

Malachite (Malachite (Cu2CO3(OH)2)) — mineral

Malachite

Malachite (Cu2CO3(OH)2)

Tree Agate (Chalcedony with Dendritic Chlorite (SiO2 with impurities)) — sedimentary/mineral

Tree Agate

Chalcedony with Dendritic Chlorite (SiO2 with impurities)

sedimentary/mineral

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

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

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Fossil Coral (Petoskey Stone or similar) (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Fossil Coral (Petoskey Stone or similar)

Hexagonaria percarinata (Fossilized Rugose Coral)

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

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Red Jasper (possibly with Quartz or Hematite) (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary or metamorphic

Red Jasper (possibly with Quartz or Hematite)

Silicon Dioxide (SiO2) with iron oxide impurities

sedimentary or metamorphic

Rose Quartz (Silicon Dioxide (SiO2) with trace rutile/dumortierite) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace rutile/dumortierite

Agate (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Jasper (likely Iron-stained) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (likely Iron-stained)

Silicon Dioxide (SiO2) with iron oxide inclusions

Porphyritic Basalt (Chinese Writing Stone) (Porphyritic Basalt with Feldspar phenocrysts) — igneous

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt with Feldspar phenocrysts

Amethyst in Matrix (Silicon Dioxide with Iron Impurities (SiO2)) — mineral

Amethyst in Matrix

Silicon Dioxide with Iron Impurities (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Sandstone (Wonderstone) (Arenite with Liesegang rings) — sedimentary

Sandstone (Wonderstone)

Arenite with Liesegang rings

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Gold-bearing Quartz Ore (Auriferous Quartz (SiO2 with Au)) — mineral

Gold-bearing Quartz Ore

Auriferous Quartz (SiO2 with Au)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)