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

Blue Agate Ring (Silicon Dioxide (Chalcedony variety Agate), SiO2) — gemstone

Blue Agate Ring

Silicon Dioxide (Chalcedony variety Agate), SiO2

Copper-bearing Basalt with Epidote and Quartz (Native copper in basalt amygdaloidal matrix) — igneous

Copper-bearing Basalt with Epidote and Quartz

Native copper in basalt amygdaloidal matrix

Jasper (Microcrystalline quartz ($SiO_2$)) — sedimentary

Jasper

Microcrystalline quartz ($SiO_2$)

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

Jasper

Silicon Dioxide (SiO2) with impurities

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Pebble with Basaltic and Quartz-rich Banding (Polymictic Lithic Pebble) — sedimentary

Pebble with Basaltic and Quartz-rich Banding

Polymictic Lithic Pebble

Quartz with Mineral Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Quartz (Jasper / Chert) (Silicon Dioxide (SiO2)) — sedimentary

Quartz (Jasper / Chert)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Mammoth Tooth (Mammuthus primigenius (Tooth fragment)) — fossil

Mammoth Tooth

Mammuthus primigenius (Tooth fragment)

Bloodstone (Chalcedony quartz variety (SiO2) with inclusions) — mineral

Bloodstone

Chalcedony quartz variety (SiO2) with inclusions

Carnelian Agate (Silicon Dioxide (Chalcedony variety)) — mineral

Carnelian Agate

Silicon Dioxide (Chalcedony variety)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Quartz-Veined Slate or Greenstone (Metamorphic rock with quartz vein (SiO2)) — metamorphic

Quartz-Veined Slate or Greenstone

Metamorphic rock with quartz vein (SiO2)

Fossilized Brachiopod Shell (Order Spiriferida (likely)) — fossil

Fossilized Brachiopod Shell

Order Spiriferida (likely)

Prehnite with Epidote inclusions (Prehnite - Ca2Al(AlSi3O10)(OH)2; Epidote - Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH)) — mineral

Prehnite with Epidote inclusions

Prehnite - Ca2Al(AlSi3O10)(OH)2; Epidote - Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH)

Precious Opal in Matrix (Hydrated Silica (SiO2·nH2O)) — mineral

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Turquoise (with Hematite) (CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (with Hematite)

CuAl6(PO4)4(OH)8·4H2O

Lapis Lazuli (Fragment) (Lazurite-rich metamorphic rock) — metamorphic

Lapis Lazuli (Fragment)

Lazurite-rich metamorphic rock

Basalt River Cobble (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Granite (Granite (composed mainly of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Mica)) — igneous

Granite

Granite (composed mainly of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Mica)

Chalcedony with Quartz (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Quartz with Mica (likely Muscovite) (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride) — igneous/metamorphic

Quartz with Mica (likely Muscovite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride

igneous/metamorphic

Tiger's Eye (Tumbled Blue/Black-Golden variety) (Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)) — metamorphic

Tiger's Eye (Tumbled Blue/Black-Golden variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

White Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

White Precious Opal

Hydrated Silica (SiO2·nH2O)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Tumbled honey-brown chalcedony or agate (Microcrystalline quartz (SiO₂), likely chalcedony; exact identification requires testing) — mineral

Tumbled honey-brown chalcedony or agate

Microcrystalline quartz (SiO₂), likely chalcedony; exact identification requires testing

Agate (SiO2) — Mineral

Agate

SiO2

Quartz with Celadonite Inclusion (Silicon Dioxide (SiO2) with green clay mineral inclusions) — mineral

Quartz with Celadonite Inclusion

Silicon Dioxide (SiO2) with green clay mineral inclusions

Druzy Quartz on Matrix (Chert/Limestone) (Silicon Dioxide (SiO2) with Carbonate host rock) — sedimentary

Druzy Quartz on Matrix (Chert/Limestone)

Silicon Dioxide (SiO2) with Carbonate host rock

Druzy Quartz on Matrix (likely Limestone or Sandstone) (Silicon Dioxide (SiO2) with various trace impurities) — Mineral on Sedimentary Rock

Druzy Quartz on Matrix (likely Limestone or Sandstone)

Silicon Dioxide (SiO2) with various trace impurities

Mineral on Sedimentary Rock

Agate (Silicon dioxide (SiO2) - variety Chalcedony) — mineral

Agate

Silicon dioxide (SiO2) - variety Chalcedony

Silver (Native Element) (Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen) — mineral

Silver (Native Element)

Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen

Red Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Red Obsidian

Volcanic Glass (Amorphous SiO2)

Smoky Quartz with Hematite Inclusions (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Smoky Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Basalt (with possible Serpentinization) (Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Basalt (with possible Serpentinization)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Quartz Geode (Silicon dioxide (SiO2)) — mineral

Quartz Geode

Silicon dioxide (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Peacock Ore (Bornite or Iridescent Chalcopyrite) (Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)) — mineral

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)

Quartz Geode (Silicon Dioxide (SiO₂)) — mineral

Quartz Geode

Silicon Dioxide (SiO₂)