Fossilized Echinoid (Sea Urchin)
Echinoidea (Class)
sedimentary
Category
Mineral, Sediment
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Fossilized Shark Tooth
Elasmobranchii gen. indet.
fossil
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with iron and other mineral inclusions
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Weathered schist
Mica schist, likely chlorite–biotite schist
metamorphic
Yellow Jasper
Quartz (Silicon Dioxide, SiO2 with impurities)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz
sedimentary
Botryoidal Hematite
Iron Oxide (Fe2O3)
mineral
Shungite
Shungite (carbon-rich Precambrian rock)
mineral
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid
Megalodon Shark Tooth
Otodus megalodon
fossil
Basalt with Chert or Jasper Inclusion
Igneous basalt / sedimentary chert nodule
igneous
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Bumblebee Jasper
Hydrothermal Volcanic Rock (Primarily Calcite with Orpiment - As2S3, Realgar, and Pyrite)
igneous
Petrified Coral (Agatized Coral)
Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)
fossil
Glauconitic Sanstone (Glauconite)
Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
River Pebble (Quartz/Chert mix)
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Chert (Jasper/River Rock)
Microcrystalline Quartz (SiO2)
sedimentary
Weathered quartz-rich pebble
Likely quartz-bearing granite or granitic gneiss; exact identification requires testing
igneous
Peanut Wood
Petrified Wood (Silicified Araucaria with Teredo boreholes)
fossil
Belemnite Fossil
Belemnitida (Order of extinct cephalopods)
sedimentary
Gastropod Fossil (Snail Steinkern)
Class Gastropoda (internal mold)
sedimentary
Banded Chert with Quartz Veining
Microcrystalline Quartz (SiO2)
sedimentary
Chocolate Jasper
Microcrystalline Quartz (SiO2) with impurities
sedimentary
Green Quartz (Prasiolite / Chlorite-Included Quartz Pebble)
Silicon Dioxide (SiO2) with micro-inclusions
mineral
Starfish Fossil
Asteroidea fossil
fossil
Petrified wood
Silicified wood, commonly quartz/chalcedony (SiO₂) replacing wood tissue
fossil
Fossilized Shark Tooth
Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)
sedimentary
Greywacke (River Pebble)
Dirty Sandstone (SiO2 with lithic fragments)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Fossilized Shark Tooth (Drum Fish Tooth/Pavement Tooth)
Sparidae or Sciaenidae (Crushing plate dental fossil)
fossil
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2 with iron oxide impurities)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily quartz replacing organic cellulose)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossil Shark Tooth
Carcharodon carcharias (modern/recent) or similar Lamniform fossil
fossil