Rock Identifier

Category

Sedimentary (Base), Then Artificial

Browse sedimentary (base), then artificial specimens identified by the Rock Identifier community.

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt with Quartz/Calcite Vein (Amygdaloidal Basalt (matrix) with Mineral Vein filling) — igneous

Basalt with Quartz/Calcite Vein

Amygdaloidal Basalt (matrix) with Mineral Vein filling

Basalt (Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)) — Igneous

Basalt

Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Andesite (Andesite (Intermediate Extrusive Igneous Rock)) — igneous

Andesite

Andesite (Intermediate Extrusive Igneous Rock)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Scoria (Vesicular Basalt) (Vesicular Basalt) — igneous

Scoria (Vesicular Basalt)

Vesicular Basalt

Feldspar-rich Granite (or Gneiss) Pebble (Granite (primarily Orthoclase Feldspar and Quartz)) — igneous

Feldspar-rich Granite (or Gneiss) Pebble

Granite (primarily Orthoclase Feldspar and Quartz)

Amygdaloidal Basalt with Secondary Minerals (Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)) — igneous

Amygdaloidal Basalt with Secondary Minerals

Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)

Moss Agate (Silicon Dioxide with inclusions (SiO2 + impurities)) — mineral

Moss Agate

Silicon Dioxide with inclusions (SiO2 + impurities)

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

Citrine

Silicon Dioxide (SiO2) with iron impurities

Native Gold Nuggets (Native Gold (Au)) — mineral

Native Gold Nuggets

Native Gold (Au)

Granite (Phaneritic Granitoid) — igneous

Granite

Phaneritic Granitoid

Diamond (Natural Carbon (C)) — mineral

Diamond

Natural Carbon (C)

Diamond (in jewelry) (Carbon (C)) — mineral

Diamond (in jewelry)

Carbon (C)

Gold (Gold (Au)) — mineral

Gold

Gold (Au)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Obsidian (Volcanic glass (high silica content based on SiO2)) — igneous

Obsidian

Volcanic glass (high silica content based on SiO2)

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

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Granite (Granite (Felsic Plutonic Rock)) — Igneous

Granite

Granite (Felsic Plutonic Rock)

Diorite (Diorite) — igneous

Diorite

Diorite

Porphyry (Porphyritic Andesite/Basalt) — igneous

Porphyry

Porphyritic Andesite/Basalt

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Slag (Anthropogenic Vitrification Product / Silicate Slag) — Anthropogenic (Man-made industrial byproduct)

Slag

Anthropogenic Vitrification Product / Silicate Slag

Anthropogenic (Man-made industrial byproduct)

Native Copper (Native Copper (Cu)) — mineral

Native Copper

Native Copper (Cu)

Tiger's Eye (Silicon dioxide (SiO2) with fibrous inclusions of crocidolite (riebeckite) that have been altered to limonite and then replaced by quartz) — Mineral

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite (riebeckite) that have been altered to limonite and then replaced by quartz

Anthracite Coal (Anthracite (Carbon-based metamorphic rock, 86-97% C)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based metamorphic rock, 86-97% C)

Amethyst Sage Agate (Silicon Dioxide (SiO2) with trace minerals (Manganese/Iron oxides)) — mineral

Amethyst Sage Agate

Silicon Dioxide (SiO2) with trace minerals (Manganese/Iron oxides)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Gold Flake (Native Gold (Au)) — mineral

Gold Flake

Native Gold (Au)

Vesicular Basalt (Lava Rock) (Basalt (Vesicular Variety)) — igneous

Vesicular Basalt (Lava Rock)

Basalt (Vesicular Variety)

Pearl (nacre) (Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin) — Organic Mineraloid

Pearl (nacre)

Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin

Organic Mineraloid

Granite (Granite) — igneous

Granite

Granite

Graphic Granite (Zebra Rock) (Pegmatitic Granite (composed of Quartz and K-Feldspar)) — igneous

Graphic Granite (Zebra Rock)

Pegmatitic Granite (composed of Quartz and K-Feldspar)

Opalite (Synthetic Glass, SiO2 base with metallic inclusions) — mineraloid (synthetic)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

mineraloid (synthetic)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Gold Ore / Native Gold (Native Gold (Au)) — mineral

Gold Ore / Native Gold

Native Gold (Au)

Marble (Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)) — metamorphic

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)

Gneiss (Gneiss (a rock type, not a specific mineral with a formula)) — Metamorphic Rock

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Metamorphic Rock

Riverstone (Quartzite/Granite Cobble) (Silicon Dioxide (SiO2) based Quartzite or Silicate-rich Granite) — metamorphic or igneous

Riverstone (Quartzite/Granite Cobble)

Silicon Dioxide (SiO2) based Quartzite or Silicate-rich Granite

metamorphic or igneous