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 with Iron Inclusions (Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)) — metamorphic

Quartzite with Iron Inclusions

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)

Quartz (Water-worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Basalt (Basalt (dominated by Plagioclase and Pyroxene)) — igneous

Basalt

Basalt (dominated by Plagioclase and Pyroxene)

Ferruginous Quartz (Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)) — mineral

Ferruginous Quartz

Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)

Milky Quartz (with Iron Oxide staining) (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz (with Iron Oxide staining)

Quartz (Silicon Dioxide - SiO2)

Mixed Mineral Collection (with Titanium Aura Quartz) (Silicon Dioxide (SiO2) with metallic coatings and various silicates) — mineral

Mixed Mineral Collection (with Titanium Aura Quartz)

Silicon Dioxide (SiO2) with metallic coatings and various silicates

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)

Quartz with Mica Schist (Pegmatite Specimen) (SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)) — Igneous/Metamorphic Hybrid

Quartz with Mica Schist (Pegmatite Specimen)

SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)

Igneous/Metamorphic Hybrid

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

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

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)

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

Quartz Vein Pebble (Silicon dioxide (SiO2)) — metamorphic

Quartz Vein Pebble

Silicon dioxide (SiO2)

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Citrine / Yellow Quartz)

Silicon Dioxide (SiO2)

Quartz (Orange/Pink variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Orange/Pink variety)

Silicon Dioxide (SiO2)

Chalcedony (SiO2 (Silicon Dioxide)) — mineral

Chalcedony

SiO2 (Silicon Dioxide)

Kunzite (Spodumene (LiAlSi2O6)) — gemstone

Kunzite

Spodumene (LiAlSi2O6)

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

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Yellow Jasper with Red Inclusion (Silicon Dioxide (SiO2) with Iron Oxides) — sedimentary

Yellow Jasper with Red Inclusion

Silicon Dioxide (SiO2) with Iron Oxides

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Brown Jasper / Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Brown Jasper / Chert

Microcrystalline Quartz (SiO2)

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

Chalcedony (Agate) Pebble

Silicon Dioxide (SiO2)

Granite (Porphyritic / Pegmatitic Quartz-Feldspar Rock) (Granite / Granodiorite) — igneous

Granite (Porphyritic / Pegmatitic Quartz-Feldspar Rock)

Granite / Granodiorite

Sandstone (Limonitic/Iron-stained) (Sandstone (containing Quartz, SiO2, and Limonite, FeO(OH)·nH2O)) — sedimentary

Sandstone (Limonitic/Iron-stained)

Sandstone (containing Quartz, SiO2, and Limonite, FeO(OH)·nH2O)

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

Chalcedony (Agate / Chert)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper (or Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper (or Chert)

Microcrystalline Quartz (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz with Epidote / Serpentine (Vein Quartz) (SiO2 (Quartz) with Ca2(Al,Fe)3(SiO4)3(OH) (Epidote)) — metamorphic

Quartz with Epidote / Serpentine (Vein Quartz)

SiO2 (Quartz) with Ca2(Al,Fe)3(SiO4)3(OH) (Epidote)

Galena (with Matrix) (Lead Sulfide (PbS)) — mineral

Galena (with Matrix)

Lead Sulfide (PbS)

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Porphyritic Basalt or Diabase (Pebble) (Extrusive / Subvolcanic Igneous Rock) — igneous

Porphyritic Basalt or Diabase (Pebble)

Extrusive / Subvolcanic Igneous Rock

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

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Flint / Chert with Cortex (Microcrystalline Quartz (SiO2)) — sedimentary

Flint / Chert with Cortex

Microcrystalline Quartz (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Limestone (Sedimentary carbonate rock (CaCO3)) — sedimentary

Limestone

Sedimentary carbonate rock (CaCO3)