Pink Granite
Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)
igneous
Category
Anthropogenic Material (Man Made Sedimentary Mimic)
Browse anthropogenic material (man made sedimentary mimic) specimens identified by the Rock Identifier community.
Rough Diamond
Diamond (pure Carbon, C)
mineral
Serpentine
Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4
metamorphic
Moss Agate / Chalcedony
Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide with inclusions (SiO2)
mineral
Red Quartzite River Pebble
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Quartzite (River Pebble)
Metamorphic Quartz (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Biotite Schist
Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Turquoise, Pearl, and Coral Necklace
CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)
mineral
Sandstone with Quartz Veins
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
sedimentary
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Citrine
Silicon dioxide (SiO2)
mineral
Granite
Phaneritic Intrusive Igneous Rock (primarily composed of SiO2, Al2O3, K2O, Na2O)
igneous
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene
igneous
Serpentine
Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4)
metamorphic
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
River Quartzite Spheroid
Recrystallized Orthoquartzite (SiO2)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Iron Meteorite
Iron-nickel alloy (e.g., Kamacite, Taenite)
Meteorite (extraterrestrial material)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Diamond (or Cubic Zirconia imitation)
Carbon (C) - Native Element
mineral
Peridotite (Pyroxenite/Serpentinized Dunite)
Ultramafic Rock (consisting primarily of Olivine and Pyroxene)
igneous
Diamond
Diamond (Pure Carbon, C)
Mineral
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Stichtite in Serpentine (Atlantisite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)
metamorphic
Pink Quartz (Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Olivine (often within Peridotite)
Magnesium iron silicate, (Mg,Fe)2SiO4
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
Mineral
Dendritic Agate (Tree Agate)
Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Rough Diamond
Diamond (Native Carbon), C
mineral
Diamond (Princess Cut)
Carbon (C)
mineral
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2)
metamorphic
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral