Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Category
Synthetic Polymer (Polylactic Acid)
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
Learn about Synthetic Polymer (Polylactic Acid) in the encyclopedia
View all →
Yellow Quartzite
Quartzite (primarily SiO2)
metamorphic
Coquina or Fossiliferous Limestone
Fossiliferous Limstone (CaCO3)
sedimentary
Quartzite (River Stone)
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Honey Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt with Calcite Veins
Aphanitic mafic volcanic rock with CaCO3 inclusions
igneous
Limestone (specifically a Crushed Aggregate fragment)
Calcium Carbonate (CaCO3)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Quartzite (Quartz Vein)
SiO2 (Silicon Dioxide)
metamorphic
Fossiliferous Limestone
Bioclastic Limestone (composition: CaCO3)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Yellow Quartzite
Quartzite (primarily SiO2)
metamorphic
Limestone (containing Fossil Mold)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartzite (Iron-Stained)
Quartzite (SiO2 with Fe2O3 inclusions)
metamorphic
Black Marble
Recrystallized Limestone (CaCO3)
metamorphic
Banded Calcite (often sold as Yellow Aragonite or Onyx)
Calcium Carbonate (CaCO3)
sedimentary
River Rock (Granite Cobble)
Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)
igneous
Coquina (Fossiliferous Limestone)
Biogenic Limestone (mostly CaCO3 / Calcium Carbonate)
sedimentary
Oolitic Limestone
Oolite (Sedimentary rock composed of CaCO3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock with Hydrothermal Veining
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
White Onyx (Marble Onyx)
Calcite (CaCO3) - Banded Calcium Carbonate
sedimentary
Carrara Marble
Metamorphosed Limestone (principally Calcium Carbonate, CaCO3)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
![Dolomite (Dolostone) (Dolomite [CaMg(CO3)2]) — sedimentary](https://media.rock.id/d6b33d26-c557-45bd-97d5-d00c4563d8ed-thumbnail.jpg)
Dolomite (Dolostone)
Dolomite [CaMg(CO3)2]
sedimentary
Malachite in Matrix
Copper Carbonate Hydroxide (Cu2CO3(OH)2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone (Crinoidal)
Bioclastic Limestone (predominantly CaCO3)
sedimentary