Rock Identifier

Category

Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Morganite Crystal

Morganite Crystal

Aquamarine Matrix

Aquamarine Matrix

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

White Beryl

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Quartzite (or Massive Quartz) (Silicon Dioxide (SiO2)) — metamorphic

Quartzite (or Massive Quartz)

Silicon Dioxide (SiO2)

Chert (with Manganese Oxide coating) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Manganese Oxide coating)

Microcrystalline Quartz (SiO2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Chert (potentially Jasper/Common Opal mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (potentially Jasper/Common Opal mixture)

Microcrystalline Quartz (SiO2)

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins (Altered mafic rock or Epidosite) — metamorphic or igneous alteration

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins

Altered mafic rock or Epidosite

metamorphic or igneous alteration

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

Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite pebble (Quartzite (SiO2 based)) — metamorphic

Quartzite pebble

Quartzite (SiO2 based)

Sandstone (Ferruginous) (Arenite (iron-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (iron-rich)

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

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Granite (Granite) — igneous

Granite

Granite

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Chert (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Quartz, SiO2)

Amethyst Quartz Crust (Crystalline Silicon Dioxide with Iron impurities (SiO2)) — mineral

Amethyst Quartz Crust

Crystalline Silicon Dioxide with Iron impurities (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Pink Granite (Phaneritic Plutonic Igneous Rock (high K-feldspar)) — igneous

Pink Granite

Phaneritic Plutonic Igneous Rock (high K-feldspar)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Oolitic Limestone (Oolite) (Oolitic Limestone (primarily Calcium Carbonate, CaCO3)) — sedimentary

Oolitic Limestone (Oolite)

Oolitic Limestone (primarily Calcium Carbonate, CaCO3)

Amethyst (Tumbled Stone) (Amethyst (Silicon Dioxide with Iron impurities, SiO2)) — mineral

Amethyst (Tumbled Stone)

Amethyst (Silicon Dioxide with Iron impurities, SiO2)

Chert (specifically Flint or Jasper variant) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Quartz with Mica/Host Rock (Silicon Dioxide (SiO2) with Phyllosilicates) — mineral

Quartz with Mica/Host Rock

Silicon Dioxide (SiO2) with Phyllosilicates

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Chert (specifically Tan/Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

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

Orange Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Iron inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron inclusions

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Pyrite in Matrix (often with Chalcopyrite) (Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)) — mineral

Pyrite in Matrix (often with Chalcopyrite)

Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartzite Pebble (Quartzite (SiO2) with mineral inclusions) — metamorphic

Quartzite Pebble

Quartzite (SiO2) with mineral inclusions

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz - SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz - SiO2)

Quartzite Pebbler (Quartzite (SiO2)) — metamorphic

Quartzite Pebbler

Quartzite (SiO2)

Calamites (Fossil Plant) (Calamites (Genus), belonging to the class Equisetopsida) — sedimentary

Calamites (Fossil Plant)

Calamites (Genus), belonging to the class Equisetopsida

Opal (Hydrated Amorphous Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

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

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Quartzite Cobble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Fluorite on Matrix (Calcium Fluoride (CaF2)) — mineral

Fluorite on Matrix

Calcium Fluoride (CaF2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Chalcedony (Agatized Coral / Rough Chalcedony Node) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)