Yellow Aventurine
Quartzite with Muscovite/Sericite inclusions (SiO2)
metamorphic
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Tiger's Eye
Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite
Mineral
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Lepidolite on Matrix
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Amber
Succinite (C10H16O)
Mineraloid
Rainbow Obsidian
Volcanic Glass (SiO2 + impurities)
Igneous
Granite
Granite (Phaneritic Igneous Rock / Quartz, Feldspar, Mica)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
Mineral
Pink Tourmaline (Rubellite)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Granite
Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)
Igneous
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Snowflake Obsidian
Volcanic glass containing Spherulites (SiO2)
igneous
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Anthracite Coal
Anthracite (Carbon-based sedimentary-derived metamorphic rock)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Serpentine (Serpentinite)
Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)
metamorphic
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Pearl
Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende, chlorite, or manganese/iron oxides
mineral
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
mineral
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (composed largely of serpentine minerals like antigorite, lizardite, or chrysotile)
metamorphic
Gold Ore in Quartz
Auriferous Quartz (Au + SiO2)
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Schist
Mica Schist
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral