Granite
Granite (Felsic Plutonic Rock)
igneous
Category
Man Made Composite
Browse man made composite specimens identified by the Rock Identifier community.
Learn about Man Made Composite in the encyclopedia
View all →
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
igneous
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite
Felsic Intrusive Igneous Rock
igneous
Granite
Phaneritic plutonic felsic rock
igneous
Granite
Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Pink Granite
Granite (Phaneritic Igneous Rock)
igneous
Sandstone
Arenite (primarily SiO2 with trace Fe2O3)
sedimentary
Limestone
CaCO3 (Mainly Calcite or Aragonite)
sedimentary
Muscovite Schist
KAl2(AlSi3O10)(OH)2 (Muscovite) in Schist Matrix
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
sedimentary
Granite
Granite (a plutonic igneous rock)
Igneous
Bivalve Shell (Fossil or Contemporary)
Class Bivalvie (various genera and species of clams, cockles, etc.)
Sedimentary (Biogenic sediment or biological remain)
Quartz (likely) or a Quartzite Pebble
Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.
Mineral, specifically a detrital grain
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (River Pebble)
Calcite (Calcium Carbonate) - CaCO3
sedimentary
Granite
Granite
igneous
Pink Granite (Fragment)
Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)
Igneous
Milky Quartz
Silicon dioxide (SiO2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Wishing Stone (Basalt or Chert with Quartz Veins)
Basalt or microcrystalline Quartz (Chert) with localized hydrothermal Quartz (SiO2) veining
igneous or sedimentary
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
sedimentary