Diorite
Intermediate plutonic igneous rock
igneous
Category
Man Made (Synthetic Rock)
Browse man made (synthetic rock) specimens identified by the Rock Identifier community.
Learn about Man Made (Synthetic Rock) in the encyclopedia
View all →
Granite
Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)
igneous
Granite Cobble
Phaneritic Felsic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Weathered quartz-rich rock, possibly granite or quartzite
Indeterminate; likely quartz–feldspar aggregate, possibly granitic gneiss
igneous
Painted River Pebble (likely Basalt or Greywacke)
Aphanitic Lithic Clast with Anthropogenic Pigment coating
Sedimentary or Igneous
Mexican Cantera Opal
Amorphous hydrated silica (SiO2·nH2O) in Rhyolitic host rock
gemstone
Jasper and Quartz Breccia
Silicified Breccia (Quartz / Chalcedony / Hematite)
sedimentary
Basalt with Weathering Rind
Basalt (Mafic volcanic rock)
igneous
Basalt with Quartz/Quartzite Veins
Aphanitic Mafic Volcanic Rock with Siliceous Infillings
igneous
Basalt
Mafic volcanic rock (primarily plagioclase, pyroxene, and olivine)
Igneous
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
metamorphic
Rounded granitic pebble
Granite, likely biotite granite or granodiorite
igneous
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Porphyritic Basalt or Porphyritic Andesite
Porphyritic Extrusive Igneous Rock
igneous
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Unknown Tumbled Stone
Unknown (Too Blurry)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic extrusive igneous rock
igneous
Clear Quartz (Cut/Faceted Gemstone)
Silicon Dioxide (SiO2)
gemstone
Leopard Skin Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Basalt
Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
Igneous
Milky Quartz with Chlorite Schist Inclusions
Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)
metamorphic
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Granite
Granite (Intrusive Igneous Rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Limestone
Calcium carbonate (CaCO3)
sedimentary
Flint / Chert (or fossiliferous nodule)
Microcrystalline quartz (SiO2)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase
igneous
Granite
Intrusive Igneous Rock
igneous
Quartzite
Metamorphic Quartz Arenite
metamorphic
Quartz (or Chert/Flint)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Igneous