Mineralized Fossil

Jasper and Quartz Breccia

Silica breccia (SiO2)

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Geode

Quartz / Chalcedony nodule with mineralized cavity

Fossiliferous Limestone

Biogenic Limestone with Brachiopod/Crinoid fragments

Quartz-rich metamorphic fragment (likely mica schist)

Mica schist, probably muscovite–quartz schist

Quartz Geode Fragment

Silicon dioxide (SiO2) within a nodule

Granite

Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)

Granite

Granite (Felsic Plutonic Rock)

Shark Tooth Fossil

Chondrichthyes fossil

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Jasper-Agate Breccia

Silicon Dioxide (SiO2) with iron oxide inclusions

Fossilized Gastropod in Limestone

Gastropoda (Class) in Fossiliferous Limestone

Quartz-bearing iron-rich rock, possibly quartzite or hydrothermal breccia

Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite; exact host rock is uncertain from the photograph

Polished fossiliferous limestone, likely crinoidal or coral limestone

Calcite (CaCO₃), fossiliferous carbonate rock

Fossilized Coral

Cnidaria (Hexacorallia)

Fossilized Shark Tooth (Partial) or Coprolite

Elasmobranchii (fossil) or Coprolite (trace fossil)

Dragon Stone (Septarian Nodule/Concretion)

Septarian Concretion (Composition: Calcite, Aragonite, Limestone/Clay)

Fossilized Horn Coral

Order Rugosa (Calcium Carbonate - CaCO3)

Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with impurities

Iron-stained quartz vein rock

Milky quartz (SiO₂) with limonite/goethite iron oxides, possibly in altered host rock

Ironstone Concretion

Ironstone (primarily Siderite or Limonite)

Petoskey Stone (Petrified Favosites)

Favosites (extinct colonial coral), CaCO3 with Silica replacement

Fossil-bearing limestone

Bioclastic limestone, likely containing bivalve or brachiopod impressions

Fossil Brachiopod

Phylum Brachiopoda

Shark Tooth Fossil

Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)

Fossiliferous Limestone with Rugose Coral

Calcium Carbonate (CaCO3) featuring Rugosa (extinct order of solitary and colony corals)

Likely iron-rich chert or jasper

Microcrystalline quartz (SiO₂), variably stained by iron oxides/hydroxides

Shark Tooth Fossil

Carcharocles megalodon or similar extinct shark tooth

Weathered limestone or calcitic fossil/reef fragment

Calcite-rich limestone (CaCO₃), possibly fossiliferous limestone

Horn Coral (Rugose Coral)

Order Rugosa (extinct)

Fossil Shark Tooth

Selachii fossil

Fossiliferous Concretion

Septarian Concretion containing Brachiopods/Crinoids

Fossilized Gastropod Internal Mold

Steinkern (Mollusca: Gastropoda)

Kambaba Jasper

Stromatolite (Fossilized Algae)

Fossil Snail

Gastropoda fossil

Seashell Fossil

Gastropoda fossil

Jasper with Agate and Quartz Inclusions

Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate

Fossilized Bone Fragment

Vertebrate Fossil

Septarian Nodule (Dragon Stone)

Septarian Concretion (Calcite, Aragonite, and Limestone/Clay)

Fossilized Shark Tooth

Chondrichthyes tooth

Weathered brown mineralized rock

Likely iron-stained quartzite or quartz-rich metamorphic rock; exact identification requires testing

Crinoid Stem Fossil in Chert

Crinoid columnal ossicles (phylum Echinodermata) embedded in microcrystalline quartz (chert)