Granite Cobble
Felsic intrusive igneous rock (composition: SiO₂ with KAlSi₃O₈, NaAlSi₃O₈, and CaAl₂Si₂O₈)
igneous
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
Granite Cobble
Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)
igneous
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Granite Pebble
Granite (Phaneritic intrusive igneous rock consisting of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Granite Pebble
Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite Pebble
Intrusive Felsic Igneous Rock (primarily SiO2 with Al2O3, K2O, Na2O)
igneous
Graphic Granite
Graphic Pegmatite
igneous
Pink Granite
Phaneritic intrusive felsic igneous rock
igneous
Pink Granite
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite Pebble
Granite; primarily composed of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica
igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Granodiorite / Granite
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granite (Weathered)
Course-grained Intrusive Igneous Rock
igneous
Orbicular Granite
Orbicular Granitoid
igneous
Pegmatitic Granite
Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)
igneous
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Granite Pegmatite
Coarse-grained Granite (SiO2 - Aluminum and Alkalies)
igneous
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Granite River Rock
Phaneritic Felsic Igneous Rock (Granite)
igneous
Unakite
Unakite Lepidolite
metamorphic
Pink Granite (Alkali Feldspar Granite)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Granite Pebble (Salt and Pepper Granite)
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)
igneous
Granitoid Pebble (Graphic Granite/Pegmatite)
Pegmatitic Granite with Quartz and Orthoclase
igneous
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
River Pebbles and Quartz
Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)
mixed
Biotite (Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
River Pebble (Gneiss or Quartzite variant)
Course-grained Metamorphic Rock (likely SiO2 dominant)
metamorphic
Epidote (with Quartz and Feldspar)
Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Orthoclase Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral
Coquina
Biogenic Limestone (Calcitic shells)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral