Fossiliferous Limestone Pebble
Calcium Carbonate (CaCO3) with Biogenic Inclusions
sedimentary
Category
Synthetic Polymer (Polylactic Acid)
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
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Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Sulfur
Native Sulfur (S8)
mineral
Sulfur-bearing Limestone (Solfatara Specimen)
Sulfur-rich Bio-limestone (Calcium Carbonate with Native Sulfur, S8)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
fossil
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite in Quartz
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (locally known as Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Galena
Lead(II) sulfide (PbS)
mineral
Granite
Granite (Phaneritic Acid Igneous Rock)
igneous
Pink Granite
Granite (Phaneritic Acid Igneous Rock)
igneous
Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Garden Pebble (Quartzite or Limestone fragment)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) fragment
sedimentary
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Silicon dioxide (SiO2)
sedimentary
Chalk
Micrite (primarily Calcium Carbonate or CaCO3)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Aragonite
Aragonite (CaCO3)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limestone (River Pebble)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (with Iron Staining)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Banded Calcite (often sold as Orange Onyx or Mexican Onyx)
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate - CaCO3
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite (River Stone)
Silicon Dioxide (SiO2)
metamorphic
Quartzite with Hematite staining
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Diamond in Gold Setting
Diamond (C - pure carbon)
mineral