Fossil Coral
Cnidaria Anthozoa (Fossilized)
sedimentary
Category
Organic Mineraloid And Mineral
Browse organic mineraloid and mineral specimens identified by the Rock Identifier community.
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Moss Agate
SiO2 (Cryptocrystalline Quartz)
gemstone
Fossilized Shark Tooth (Otodus)
Otodus sp. (calcium phosphate/hydroxylellite)
sedimentary
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Ambergris
Physeter macrocephalus excreta (Ambergris)
mineraloid / organic geological find
Amber
Succinite / Fossilized Tree Resin
fossil
Banded Chert / Flint Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Moss Agate
Agate (Silicon Dioxide, SiO2) with dendritic inclusions
sedimentary
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
sedimentary
Fossilized Bone
Permineralized Bone (Vertebrate Fossil)
fossil
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Amber
Succinite (Organic Gemstone)
mineral
Amber / Copal
Organic resin, C10H16O
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. indet.
fossil
Moss Agate (Crescent Moon Shape)
Silicon Dioxide (SiO2) with iron/manganese inclusions
mineral
Moss Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
mineral
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
mineral
Turquoise, Pearl, and Coral Necklace
CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)
mineral
Hematoid Quartz (Fire Quartz)
Silicon Dioxide with Iron Oxide (SiO2 with Fe2O3)
mineral
Amethyst Cluster
Silicon Dioxide (Quartz variety: Amethyst) - SiO2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Amethyst
Quartz (SiO2)
mineral
Jasper with Purple Fluorite or Chalcedony
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (with Sandstone/Quartzite rocks)
Silicon Dioxide (SiO2)
mineral
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral