Rock Identifier

Category

Sedimentary Or Igneous Fragment

Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossil Coral (Petoskey Stone / Rugose Coral) (Hexagonaria percarinata (Order: Rugosa, Fossilized Calcium Carbonate CaCO3)) — sedimentary

Fossil Coral (Petoskey Stone / Rugose Coral)

Hexagonaria percarinata (Order: Rugosa, Fossilized Calcium Carbonate CaCO3)

Sand Dollar Fossil (Echinoidea) (Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)) — sedimentary

Sand Dollar Fossil (Echinoidea)

Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)

Fossilized Bone (Petrified Bone) (Permineralized Vertebrate Remains) — sedimentary

Fossilized Bone (Petrified Bone)

Permineralized Vertebrate Remains

Spinosaurus fossil (permineralized bone) (Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)) — sedimentary

Spinosaurus fossil (permineralized bone)

Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Heat-Treated Citrine (Amethyst Geode Fragment) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Heat-Treated Citrine (Amethyst Geode Fragment)

Silicon Dioxide (SiO2) with iron impurities

Quartz (Small Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Quartz (Small Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz fragment (Silicon dioxide (SiO2)) — mineral

Quartz fragment

Silicon dioxide (SiO2)

Quartz (Smoky/Milky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

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

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Chondrite Meteorite (Ordinary Chondrite (S-type Asteroid fragment)) — mineral

Chondrite Meteorite

Ordinary Chondrite (S-type Asteroid fragment)

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

Quartz (Crystal Fragment)

Silicon Dioxide (SiO2)

Quartz / Quartzite Fragment (Silicon Dioxide (SiO2)) — mineral / metamorphic

Quartz / Quartzite Fragment

Silicon Dioxide (SiO2)

mineral / metamorphic

Libyan Desert Glass (Impactite (vitreous silica), SiO2) — mineral

Libyan Desert Glass

Impactite (vitreous silica), SiO2

Concrete / Anthropogenic Conglomerate (Man-made composite material (Portland cement, aggregate, and water)) — not a natural rock

Concrete / Anthropogenic Conglomerate

Man-made composite material (Portland cement, aggregate, and water)

not a natural rock

Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads) (BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel) — mineral

Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)

BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

Quartz (Small fragments) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small fragments)

Silicon Dioxide (SiO2)

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

Lapis Lazuli (Fragment)

Lazurite-rich metamorphic rock

Chondrite Meteorite (Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)) — Mineral

Chondrite Meteorite

Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (SiO2 - Silicon Dioxide)) — metamorphic

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Slate (Slate) — metamorphic

Slate

Slate

White Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (Druzy/Macro-crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz (Microcrystalline Gravel) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline Gravel)

Silicon Dioxide (SiO2)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

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

Quartz (White/Milky Quartz)

Silicon Dioxide (SiO2)

Pietersite (Brecciated Chatoyant Tiger's Eye (SiO2)) — mineral

Pietersite

Brecciated Chatoyant Tiger's Eye (SiO2)

Cullet (Slag Glass) (Amorphous Silica (SiO2) with various metal oxide colorants) — mineraloid / anthropogenic

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

mineraloid / anthropogenic

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Peacock Ore (Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with iridescent tarnish) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with iridescent tarnish

Brecciated Quartzite (Brecciated Quartzite) — Metamorphic

Brecciated Quartzite

Brecciated Quartzite