Pearl
Calcium carbonate (CaCO3) as Aragonite or Calcite
mineral
Category
Organic (Paper And Cellulose)
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Amber
Succinite (Fossilized Resin)
mineral
Chert Concretion
Microcrystalline Quartz (SiO2) in Carbonate Matrix
sedimentary
Amber
Succinate (Fossilized Resin)
mineral
Pearl (Pendant)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
gemstone
Amber
Succinite (Organic Mineraloid)
mineral
Chert (with Limestone and Iron Oxide staining)
Cryptocrystalline Quartz (SiO2)
sedimentary
Likely bituminous coal
Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed visually
sedimentary
Amber
Succinite (C10H16O)
gemstone
Polished moss agate / dendritic agate
Microcrystalline quartz (SiO₂) with iron- and manganese-oxide inclusions
mineral
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Polished moss agate
Moss agate, a variety of chalcedony (microcrystalline quartz, SiO₂)
gemstone
Druzy Chalcedony/Quartz on Fluorite core
Silicon Dioxide (SiO2) on Calcium Fluoride (CaF2)
mineral
Glauconitic Sanstone (Glauconite)
Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Glauconite (Greensand)
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Fossilized Shark Teeth
Otodus sp. (Eocene Sand Tiger/Mackerel Shark)
fossil
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
sedimentary
Fossilized Tooth
Vertebrate Fossilized Tooth (Mineralized Biogenic Material)
fossil
Fossil Crab
Decapoda (likely Avitelmessus or Raninidae family)
sedimentary
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fairy Stone (Menilite Concretion)
Carbonate-rich concretion (often Siderite or Calcite in Clay)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Silicified Gastropod Fossil (Agatized Fossil)
Gastropoda (Class) preserved in Chalcedony/Quartz (SiO2)
sedimentary
Fossilized Shark Tooth
Carcharocles sp. (likely Lemon or Sand Tiger)
sedimentary
Chert
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Limestone pebble
Sedimentary rock, primarily calcium carbonate (CaCO3)
sedimentary
Graphite
Graphite (Carbon, C)
mineral
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Chert (often called Flint or Jasper)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Basanite)
Chert (Microcrystalline SiO2)
sedimentary