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

Phantom Quartz with Chlorite and Hematite inclusions (Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)) — mineral

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Diamond (Lesedi La Rona specimen) (Diamond (Pure Carbon, C)) — mineral

Diamond (Lesedi La Rona specimen)

Diamond (Pure Carbon, C)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Yellow Quartzite (River Pebble) (Quartzite (mainly SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (mainly SiO2)

Coarse Sand or Fine Gravel (Clastic Sediment (unconsolidated)) — sedimentary

Coarse Sand or Fine Gravel

Clastic Sediment (unconsolidated)

Sunstone (Aventurine Feldspar (Plagioclase or Oligoclase)) — mineral

Sunstone

Aventurine Feldspar (Plagioclase or Oligoclase)

Limonite Pseudomorph after Pyrite (Limonite (Hydrous iron oxides, FeO(OH)·nH2O) replacing Pyrite (FeS2)) — mineral

Limonite Pseudomorph after Pyrite

Limonite (Hydrous iron oxides, FeO(OH)·nH2O) replacing Pyrite (FeS2)

Zoisite with Ruby (Anyolite) (Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)) — metamorphic

Zoisite with Ruby (Anyolite)

Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)

Fluorite (Purple variety) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Purple variety)

Calcium Fluoride (CaF2)

Basalt with Quartz Vein (Basaltic rock with hydrothermal SiO2 filling) — igneous

Basalt with Quartz Vein

Basaltic rock with hydrothermal SiO2 filling

Graphite (Graphite (Native Carbon, C)) — metamorphic

Graphite

Graphite (Native Carbon, C)

Bumblebee Jasper (Fibrous Calcite with Arsenic and Sulfur Inclusions) — gemstone

Bumblebee Jasper

Fibrous Calcite with Arsenic and Sulfur Inclusions

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

Pink Opal

Hydrated Silica (SiO2·nH2O)

Fossilized tooth, likely a mammalian tooth fragment (Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth) — fossil

Fossilized tooth, likely a mammalian tooth fragment

Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth

Echinoid Fossil in Flint or Chert Nodule (Echinoidea embedded in sedimentary silica (SiO2)) — fossil

Echinoid Fossil in Flint or Chert Nodule

Echinoidea embedded in sedimentary silica (SiO2)

Blue Celestite (Celestine (SrSO4)) — mineral

Blue Celestite

Celestine (SrSO4)

Amethyst Beads (Silicon Dioxide (SiO2)) — gemstone

Amethyst Beads

Silicon Dioxide (SiO2)

Generic Pebble / Rock Fragment (Lithic fragment / Weathered rock pebble) — sedimentary

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock pebble

Tumbled Amethyst (Quartz (Silicon Dioxide, SiO2, colored by iron impurities)) — mineral

Tumbled Amethyst

Quartz (Silicon Dioxide, SiO2, colored by iron impurities)

Amethyst Cluster (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst Cluster

Quartz (Silicon Dioxide, SiO2)

Fossiliferous Limestone (Biogenic Sedimentary Rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock (CaCO3)

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

Pyrite in Matrix

Iron Sulfide (FeS2)

Barite Rose (Barium Sulfate (BaSO4)) — mineral

Barite Rose

Barium Sulfate (BaSO4)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Amethyst (Quartz (SiO2)) — mineral

Amethyst

Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Jasper (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Fossil Coral (Rugosa or Tabulata / Hexacorallia (replaced with silica or calcite)) — fossil

Fossil Coral

Rugosa or Tabulata / Hexacorallia (replaced with silica or calcite)

Rainbow Pyrite (Iron Sulfide (FeS2) with iridescent oxidation) — mineral

Rainbow Pyrite

Iron Sulfide (FeS2) with iridescent oxidation

Blue Schist / Lydian Stone / Chert with Glaucophane (Metamorphic rock containing quartz and glaucophane) — metamorphic

Blue Schist / Lydian Stone / Chert with Glaucophane

Metamorphic rock containing quartz and glaucophane

Chalcopyrite (Copper iron sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper iron sulfide (CuFeS2)

Quartz Pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon dioxide (SiO2)

Limonite (FeO(OH)·nH2O) — mineral

Limonite

FeO(OH)·nH2O

Spherulitic Rhyolite / Leopard Skin Rhyolite (Extrusive felsic igneous rock with spherulites) — igneous

Spherulitic Rhyolite / Leopard Skin Rhyolite

Extrusive felsic igneous rock with spherulites

Red Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Red Jasper

Microcrystalline quartz (SiO2)

Porphyritic Basalt or Porphyry (Porphyritic Extrusive Igneous Rock) — igneous

Porphyritic Basalt or Porphyry

Porphyritic Extrusive Igneous Rock

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

Quartz (Quartzite or Milky Quartz)

Silicon Dioxide (SiO2)

Serafina (Serafinite / Clinochlore) (Clinochlore (Mg5Al)(AlSi3O10)(OH)8) — mineral

Serafina (Serafinite / Clinochlore)

Clinochlore (Mg5Al)(AlSi3O10)(OH)8

Mica Schist with Vein (Mica Schist) — metamorphic

Mica Schist with Vein

Mica Schist

Gneiss with Quartz Vein (Metamorphic Gneiss) — metamorphic

Gneiss with Quartz Vein

Metamorphic Gneiss

Quartzite Cobble / Quartz River Pebble (Silicon Dioxide (SiO2) - Quartzite / Quartz) — metamorphic

Quartzite Cobble / Quartz River Pebble

Silicon Dioxide (SiO2) - Quartzite / Quartz