Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Category
This Appears To Be A Man Made Metallic Object, Likely Jewelry, Not A Natural Rock, Mineral, Or Geological Specimen.
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Mineral
Banded Iron Formation (BIF) / Tiger Iron variety
Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
White Topaz
Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2
mineral
Green Druzy Quartz (Prasiolite)
Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Baroque Pearl (and potentially a small Sapphire/Blue Topaz)
Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.
Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Green Aventurine
Aventurine (Silicon dioxide, SiO₂)
Mineral; variety of Quartz
Diamond
Carbon (C)
mineral
Druzy Quartz on Chert/Siltstone
Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix
sedimentary
Iron Meteorite Fragment
Siderite (Geological term for iron meteorite class - Fe/Ni alloy)
igneous
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Granular)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities
mineral
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Lapis Lazuli (Raw)
Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S
metamorphic
Jasper (yellow/cream variety)
SiO₂ (Cryptocrystalline Quartz)
Sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borate Silicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement) SiO2
sedimentary
Pyrite (on a metal substrate)
Iron Sulfide (FeS2)
mineral
Dalmation Stone (often called Dalmatian Jasper)
Antiperthite-rich Microgranite
igneous
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Hematite/Goethite shell with Sandstone core)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral