Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Category
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
Quartzite (Milky Quartz Cobble)
Silicon Dioxide (SiO2)
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
Gabbro
Phaneritic Mafic Igneous Rock
Coquina
Bioclastic Limestone
Basalt River Pebble
Basalt (Aphanitic Mafic Volcanic Rock)
Granite
Felsic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)
Granite
Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Chert
Microcrystalline Quartz (SiO2)
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
Weathered Basalt with Iron Staining
Aphanitic Mafic Volcanic Rock
Quartz-veined Basalt
Amygdaloidal or Porphyritic Basalt with Silicon Dioxide (SiO2) vein
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
Coquina
Bioclastic Limestone
Orca Agate
Chalcedony (Microcrystalline Quartz, SiO2)
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
Slag Glass
Amorphous Silica / Glass Slag
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Basalt with Quartz/Calcite Vein
Amygdaloidal Basalt (matrix) with Mineral Vein filling
Granite
Phaneritic Felsic Intrusive Igneous Rock
Diorite
Diorite (Intermediate intrusive igneous rock)
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Pink Granite
Phaneritic Felsic Igneous Rock (high K-feldspar)
Basalt
Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8
Mica Schist with Garnet
Garnetiferous Mica Schist
Granite
Felsic Plutonic Rock (Granite)
Pyrite in Gossan
Iron Sulfide (FeS2) in Ferruginous Rock
Sandstone (Cross-bedded Drill Core)
Clastic Sedimentary Rock (primarily SiO2)
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Que Sera Stone (Llanite)
Rhyolite containing blue quartz and feldspar
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
Banded Gneiss
Gneiss (Metamorphic Rock)
Basalt with Scoria/Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
Limonitic Scoria (Vesicular Basalt with Iron Staining)
Highly vesicular basalt heavily stained by Limonite [FeO(OH)·nH2O]
Diorite (with Iron Staining)
Phaneritic Intermediate Igneous Rock
Granite
Granite (Felsic Plutonic Rock)
Basalt pebble
Basalt (Mafic Extrusive Igneous Rock)