Rock Identifier

Category

Organic (Non Rock)

Browse organic (non rock) specimens identified by the Rock Identifier community.

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Quartzite (Ferruginous) (Quartzite (major component SiO2 with Fe2O3 impurities)) — metamorphic

Quartzite (Ferruginous)

Quartzite (major component SiO2 with Fe2O3 impurities)

Sandstone (Arenite (SiO2 based with mineral cement)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cement)

Sandstone (Banded) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Unakite (Unakite (altered granite)) — metamorphic

Unakite

Unakite (altered granite)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Sandstone (Arenite (primarily SiO2 with various cementing agents)) — sedimentary

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Sandstone (with potential iron-oxide weathering) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential iron-oxide weathering)

Arenite (SiO2 based)

Druzy Quartz (Crystalline Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Crystalline Silicon Dioxide (SiO2)

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (SiO2 major component)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 major component)

Ferruginous Sandstone (Red Sandstone) (Arenite with Hematite/Limonite cement) — sedimentary

Ferruginous Sandstone (Red Sandstone)

Arenite with Hematite/Limonite cement

Sandstone (Arenite (primarily Quartz SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Red Sandstone (Iron-rich) (Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)) — sedimentary

Red Sandstone (Iron-rich)

Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)

Sandstone (Quartzite-rich River Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich River Cobble)

Clastic sedimentary rock (primarily SiO2)

Sandstone Pebble (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily Quartz, SiO2)

Red Aventurine (Aventurine Quartz (SiO2 + Hematite/Goethite)) — metamorphic

Red Aventurine

Aventurine Quartz (SiO2 + Hematite/Goethite)

Garnet (Almandine formula: Fe3Al2(SiO4)3) — mineral

Garnet

Almandine formula: Fe3Al2(SiO4)3

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

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

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

Rose Quartz

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

Nephrite Jade (Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Flint (Chert) (Silicon Dioxide (SiO2)) — sedimentary

Flint (Chert)

Silicon Dioxide (SiO2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst (Amethyst (variety of Quartz, SiO2)) — mineral

Amethyst

Amethyst (variety of Quartz, SiO2)

Ruby (Corundum (Al2O3 with Chromium impurities)) — mineral

Ruby

Corundum (Al2O3 with Chromium impurities)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Sapphire (Corundum (Al2O3) with iron and titanium impurities) — mineral

Blue Sapphire

Corundum (Al2O3) with iron and titanium impurities

Vanadinite (Lead Chlorovanadate, Pb5(VO4)3Cl) — mineral

Vanadinite

Lead Chlorovanadate, Pb5(VO4)3Cl

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Tree Agate (Silica (SiO2) with Chlorite inclusions) — mineral

Tree Agate

Silica (SiO2) with Chlorite inclusions

Bloodstone (Heliotrope) (Silicon Dioxide (SiO2) with inclusions of Iron Oxide) — mineral

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Iron Oxide

Quartz River Cobble (Silicon Dioxide (SiO2)) — Mineral (Primary constituent)

Quartz River Cobble

Silicon Dioxide (SiO2)

Mineral (Primary constituent)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Common Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

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

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)