Fossilized Horn Coral
Order Rugosa (Rugose Coral)
sedimentary
Category
Organic Mineraloid And Mineral
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Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Moss Agate
Silicon dioxide (SiO2) with inclusions
Mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Limestone (Travertine/Tufa variant)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Arrowhead Preform or Flake)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (fossilized organic resin)
mineral
Polished moss agate (likely dendritic agate)
Chalcedony, microcrystalline quartz (SiO₂), with inclusions of manganese/iron oxides or hornblende
gemstone
Tumbled amber
Fossilized plant resin; commonly succinite (C10H16O)
gemstone
Chert (Polished/Tumbled)
Silicon Dioxide (SiO2)
sedimentary
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Quartzite river stone
Quartzite (SiO2)
metamorphic
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
fossil
Starfish Fossil
Asteroidea fossil
fossil
Fossil Shark Tooth
Chondrichthyes tooth fossil
fossil
Turtle Stone / Septarian Nodule (Water-worn)
Septarian Concretion
sedimentary
Amber (Raw Copal)
Fossilized Plant Resin (Gummite/Succinite)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
mineral
Amber
Succinite (fossilized tree resin)
mineral
Pink Opal
Hydrated Silica (SiO2·nH2O)
mineral
Moss Agate with Quartz Druzy
Chalcedony with inclusions (SiO2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mg/Mn/Chlorite)
mineral
River Cobble (Sandstone)
Arenite (primarily SiO2)
sedimentary
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Jasper / Agate with Petrified Wood Inclusion
SiO2
mineral
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite Geode
Iron Disulfide (FeS2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified wood
Silicified wood, commonly quartz/chalcedony (SiO₂) replacing wood tissue
fossil
Quartz River Pebble with Algae
Silicon Dioxide (SiO2) with organic biofilm
metamorphic or igneous
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2)
mineral
Banded Marble (Egg Carving)
Metamorphosed Limestone (predominantly CaCO3)
metamorphic
Polished fossilized wood (likely petrified wood)
Silicified wood; primarily quartz (SiO₂) replacing wood tissue
fossil
Fossil Shark Tooth (Sand Tiger Shark type)
Carcharias sp. (likely Odontaspis)
fossil
Fossilized Shark Tooth
Chondrichthyes (Class) - likely Carcharodon or Otodus genus
fossil