Rock Identifier

Category

Sedimentary Or Metamorphic (Base Substrate)

Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.

Granite (Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)

Basalt (River Stone) (Basalt) — igneous

Basalt (River Stone)

Basalt

Granite (Plutonic felsic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Granite (Granite (High-silica plutonic rock)) — igneous

Granite

Granite (High-silica plutonic rock)

Ferro-silicate Slag (Industrial Vitrified Slag (High-silica amorphous glass)) — Mineral byproduct (Anthropogenic)

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Mineral byproduct (Anthropogenic)

Granite (Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Basalt (Mafic volcanic rock (Silicon dioxide 45-52%)) — igneous

Basalt

Mafic volcanic rock (Silicon dioxide 45-52%)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Diorite (Salt and Pepper Rock) (Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)) — igneous

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite (Plagioclase Feldspar + Amphibole/Biotite)

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Felsic Igneous Rock (Granite)

Slag (Industrial Byproduct) (Artificial silicate/iron byproduct) — Mineral description (Anthropogenic material)

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Mineral description (Anthropogenic material)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Andesite (Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)) — igneous

Andesite

Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Amygdaloidal Basalt with Epidote/Chlorite (Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))) — igneous

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

Crushed Granite Gravel (Granite (Mainly Quartz, Feldspar, and Mica)) — igneous

Crushed Granite Gravel

Granite (Mainly Quartz, Feldspar, and Mica)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Silicon dioxide (SiO2)) — Mineral

Quartz

Silicon dioxide (SiO2)

Sapphire (Corundum (Al2O3)) — mineral

Sapphire

Corundum (Al2O3)

Granite Thin Section (Granitic rock (Phaneritic texture)) — igneous

Granite Thin Section

Granitic rock (Phaneritic texture)

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

Moss Agate

Silicon Dioxide with inclusions (SiO2)

Firewood (Wood Log) (Lignum (Plant tissue composed of cellulose and lignin)) — Organic (Non-geological)

Firewood (Wood Log)

Lignum (Plant tissue composed of cellulose and lignin)

Organic (Non-geological)

Rose Quartz (Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese

Ocean Jasper (Orbicular Jasper) (Silicon Dioxide (SiO2) with various inclusions) — sedimentary (geologically classified as a variety of chalcedony/quartz)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

sedimentary (geologically classified as a variety of chalcedony/quartz)

Quartz (likely a weathered/tumbled piece) (Quartz (SiO₂)) — Mineral

Quartz (likely a weathered/tumbled piece)

Quartz (SiO₂)

Quartz (SiO₂ (Silicon Dioxide)) — Mineral

Quartz

SiO₂ (Silicon Dioxide)

Clear Quartz (Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Tree Agate (also known as Dendritic Agate) (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — mineral

Tree Agate (also known as Dendritic Agate)

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Cinnabar in Quartz (Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions) — Mineral

Cinnabar in Quartz

Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Fire Agate (Silicon Dioxide (SiO2) with layers of Limonite/Goethite) — mineral

Fire Agate

Silicon Dioxide (SiO2) with layers of Limonite/Goethite

Snowflake Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with Cristobalite inclusions)

Dyed Agate (Silicon Dioxide (SiO2) - variety Chalcedony) — mineral

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Cubic Zirconia (CZ) Jewelry (Zirconium dioxide (ZrO2)) — mineral (synthetic)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

mineral (synthetic)

Mahogany Obsidian (Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2) — igneous

Mahogany Obsidian

Obsidian (Volcanic Glass with Hematite/Magnetite inclusions), SiO2

Bloodstone (Heliotrope) (Silicon Dioxide (SiO2) - Variety of Chalcedony/Jasper) — mineral

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) - Variety of Chalcedony/Jasper

Snowflake Obsidian (Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Howlite (Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)) — mineral

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

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

Labradorite

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

Tree Agate (or Moss Agate) (Dendritic Agate (Silicon Dioxide - SiO2)) — mineral

Tree Agate (or Moss Agate)

Dendritic Agate (Silicon Dioxide - SiO2)

Schist (Schist) — Metamorphic

Schist

Schist