Rock Identifier

Category

Synthetic (Not A Natural Rock)

Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.

Pink Granite (Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)) — igneous

Pink Granite

Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Prehnite (Prehnite, Ca2Al2Si3O10(OH)2) — Mineral

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Pebble (likely Sandstone or Granitic Pebble) (Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)) — Rock (likely Sedimentary)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Rock (likely Sedimentary)

Shale or Siltstone (Sedimentary Rock (Siliciclastic)) — sedimentary

Shale or Siltstone

Sedimentary Rock (Siliciclastic)

Aventurine (Aventurine Quartz (SiO2 with inclusions)) — metamorphic

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Granite (Phaneritic Plutonic Felsic Rock) — igneous

Granite

Phaneritic Plutonic Felsic Rock

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (with Iron Staining) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (with Iron Staining)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Diamond (as set in a metal alloy ring) (Diamond (Pure Carbon, C)) — mineral

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

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

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Blue Lace Agate (Cryptocrystalline Quartz (SiO2) with trace minerals) — sedimentary

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

Tumbled Stones (various) (Mixed Silica-based Minerals (primarily Quartz and Chalcedony)) — mineral

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)

Amethyst Geode (Carved) (Amethyst (Violet Crystalline Quartz - SiO2)) — mineral

Amethyst Geode (Carved)

Amethyst (Violet Crystalline Quartz - SiO2)

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

Agate (specifically Chalcedony nodule)

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Shale with Iron Oxide Staining (Fissile Mudstone (primarily clay minerals and quartz)) — sedimentary

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Granite Pebble (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Pink Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

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

Amethyst Quartz (Tumbled)

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Blue Agate (Tumbled and Dyed) (Silicon Dioxide (SiO2) with likely organic dyes) — mineral

Blue Agate (Tumbled and Dyed)

Silicon Dioxide (SiO2) with likely organic dyes

Granite Cobble (Phaneritic Felsic Igneous Rock) — igneous

Granite Cobble

Phaneritic Felsic Igneous Rock

Raw Diamond (Rough Uncut) (Diamond (C - pure carbon)) — mineral

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Petoskey Stone (Hexagonaria percarinata) — sedimentary

Petoskey Stone

Hexagonaria percarinata

Yellow Quartz (Citrine or Yellow Jasper) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2)

Sandstone (Pebble) (Sandstone (arenite, arkose, wacke depending on composition)) — sedimentary

Sandstone (Pebble)

Sandstone (arenite, arkose, wacke depending on composition)

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (SiO2 primary composition)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 primary composition)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Basalt (River Pebble) (Extrusive Mafic Igneous Rock) — igneous

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Scoria (Lava Rock) (Scoria (vesicular basaltic rock)) — igneous

Scoria (Lava Rock)

Scoria (vesicular basaltic rock)

Banded Chalcedony (Agate) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Chalcedony (Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Dyed Agate (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

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

Diorite

Diorite (Intermediate intrusive igneous rock)

Sandstone Concretion (Arenaceous concretion (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

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

Amethyst

Silicon Dioxide with iron impurities (SiO2)

Scoria (Lava Rock) (Scoria (Mafic Volcanic Rock)) — igneous

Scoria (Lava Rock)

Scoria (Mafic Volcanic Rock)

Scoria (Red Lava Rock) (Scoria (Vesicular basaltic rock)) — Igneous

Scoria (Red Lava Rock)

Scoria (Vesicular basaltic rock)

Basalt with Scoria/Vesicular Texture (Vesicular Basalt (Iron-rich/Oxidized)) — igneous

Basalt with Scoria/Vesicular Texture

Vesicular Basalt (Iron-rich/Oxidized)

Smoky Quartz on Matrix (Silicon Dioxide (SiO2) with trace impurities and aluminum inclusions) — mineral

Smoky Quartz on Matrix

Silicon Dioxide (SiO2) with trace impurities and aluminum inclusions

Citrine (Citrine (Silicon Dioxide - SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide - SiO2)