Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Category
Mineral And Organic Gemstone
Browse mineral and organic gemstone specimens identified by the Rock Identifier community.
Learn about Mineral And Organic Gemstone in the encyclopedia
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Red Sandstone
Sandstone (Quartz Arenite / Arkose with Hematite cement)
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Black Shale
Argillaceous Chert/Shale
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Bivalve Fossil (Internal Mold/Steinkern)
Class Bivalvia (Fossilized Mold)
sedimentary
Dyed Coral
Calcium carbonate (CaCO3) - Calcite or Aragonite with dye
organic gemstone
Amber (Butterscotch/Egg Yolk Variety)
Succinite (Approx. C10H16O)
Organic Gemstone
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) fossil
fossil
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Raw Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline feldspar (KAlSi3O8)
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Emerald in Host Rock
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Geode (Unopened)
SiO2 (Quartz-filled Sedimentary Nodule)
sedimentary
Fossilized Bone Fragment
Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)
sedimentary
Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Petrified Wood
Silicified Wood (primarily Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Moss Agate with Jasper
Chalcedony (SiO2 with inclusions)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Fossilized Shark Tooth
Otodus sp. (approximate genus) / Hydroxyapatite fossil
sedimentary
Geode
Quartz nodule / Chalcedony-lined cavity
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Petrified Wood Fragment
Silicified Wood (SiO2)
fossil
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petrified Wood
Silicified wood (SiO2)
fossil
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid
Amber / Copal
Succinite (fossilized tree resin)
mineraloid
Chert (variations include Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (often referred to as Flint or Jasper)
Chalcedony (SiO2) - Silicon Dioxide
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Shark Tooth Fossil
Carcharocles megalodon or similar fossilized shark tooth
fossil