Halite
Halite (Sodium Chloride, NaCl)
mineral
Category
Not A Rock (Man Made Origin)
Browse not a rock (man made origin) specimens identified by the Rock Identifier community.
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Druzy on Geode Fragment
Silicon Dioxide (SiO2)
mineral
Flower Jasper
Agatized Fossil Coral / Chalcedony (SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Fossilized Turritella Gastropod (Internal Mold)
Turritella (Fossil Gastropod Crust)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
River Pebble (Quartzite/Chert)
Quartzite with inclusions (SiO2)
metamorphic
Diabase (Greenstone)
Diabase (also known as Dolerite)
igneous
Greywacke (River Siltstone)
Lithic Sandstone / Greywacke
sedimentary
Unakite
Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Crinaudite / Fossilized Crinoid Stem
Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix
sedimentary
Unakite
Epidotized Granite
metamorphic
Basalt
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Quartzite with Quartz Veining
Quartzite (primarily SiO2)
metamorphic
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
sedimentary
Chert (Chert / Flint)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
sedimentary
Milky Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Orthoceras Fossil in Limestone
Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Pyrite in Shale
Iron Sulfide (FeS2) in Argillaceous Shale
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2 with minor impurities)
metamorphic
Green Porphyry (Flowerstone)
Porphyritic Andesite or Basalt
igneous
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Azurite and Malachite on Matrix
Cu3(CO3)2(OH)2 (Azurite) and Cu2CO3(OH)2 (Malachite)
mineral
Citrine (Heat-treated Amethyst)
Citrine Quartz (SiO2)
Mineral (Tectosilicate)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Copper Ore with Malachite and Chrysocolla
Cu2CO3(OH)2 (Malachite) with Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
mineral
Dyed Pink Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
metamorphic
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary