Fossil gastropod shell
Fossilized marine gastropod; exact genus/species requires locality and examination
fossil
Category
Mineral, Sediment
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Iron-rich laterite or weathered ironstone
Ferricrete/limonite-rich ironstone; primarily goethite (FeO(OH)) and hematite (Fe₂O₃), with clay minerals
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
River Stone (likely Mudstone or Siltstone)
Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil
Red jasper (likely brecciated jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides
mineral
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Shale
Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)
sedimentary
Petrified Wood (Black / Carbonized)
Silicon Dioxide (Quartz/Chalcedony replacing Organic Matter)
fossil
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Fossilized Shark Tooth
Chondrichthyes (Class) - likely Carcharodon or Otodus genus
fossil
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Fossil shell fragment, likely brachiopod or bivalve
Indeterminate fossilized carbonate shell; possibly Spiriferida (brachiopod)
fossil
Zebra Marble
Metamorphosed Alabaster/Limestone (CaCO3)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
River Stone (likely Andesite or Siltstone)
Intermediate Volcanic Rock / Fine-grained Sedimentary Rock
igneous
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Mammoth Tooth
Mammuthus primigenius (Tooth fragment)
fossil
Mica-rich metamorphic rock, likely schist
Muscovite–biotite schist, possibly with quartz and feldspar
metamorphic
Polychrome Jasper
Silicon Dioxide (SiO2) with iron and other mineral inclusions
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Carbonado (Black Diamond)
Carbonado (Polycrystalline Diamond)
mineral
Carbonate Beach Sand
Biogenic Carbonate Sediment (CaCO3)
sedimentary
Sea Glass (Frosted Glass Fragment)
Amorphous Silica (Anthropogenic Sediment)
sedimentary
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Petrified Wood
Silicified wood (permineralized wood)
fossil
Fossilized Wood (Petrified Wood) and Associated Rocks
Silicified Wood / Xylopal
fossil
Quartz (with Sandstone/Quartzite rocks)
Silicon Dioxide (SiO2)
mineral
Fossilized bivalve shell in limestone
Calcitic fossil shell; likely an oyster or other rudist/bivalve (Bivalvia), preserved in carbonate rock
fossil
Fossil Belemnite Guard
Belemnitella spp. (rostrum)
fossil
Jasper
Silicon Dioxide (SiO2)
sedimentary
Concretion
Septarian concretion (likely containing Calcite or Siderite)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Dyed Imperial Jasper (Sea Sediment Jasper)
Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony
sedimentary
Oyster Shell (Aragonite/Calcite)
Calcium Carbonate (CaCO3)
sedimentary
Bivalve Fossil (Internal Mold)
Class Bivalvia (Phylum Mollusca)
sedimentary
Chalcedony (likely agate/chert variety)
Microcrystalline quartz, SiO₂
mineral
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Amber
Succinite (fossilized resin)
mineral