Sedimentary (Fossilized Organic Remain)

Chert (specifically Novaculite or Porcelainite)

Microcrystalline to Cryptocrystalline Quartz (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Weathered fossilized wood (likely petrified wood)

Silicified wood; commonly quartz/chalcedony replacing wood tissue (SiO₂)

Dendritic Agate (or Dendritic Opal)

SiO2 (for Agate), SiO2·nH2O (for Opal)

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Fossilized Brachiopod

Brachiopoda (likely Order Spiriferida or Productida)

Calamites Fossil in Sandstone

Calamites (Genus) in Lithic Sandstone

Polished amber-like organic gemstone

Likely amber (fossilized plant resin), possibly copal or brown chalcedony; exact identification requires testing

Polished amber-like organic gemstone

Amber (fossilized tree resin), commonly succinite; exact identification is uncertain from the image

Fossil Shell

Invertebrate fossil (Mollusca)

Amber (likely Baltic amber)

Fossilized tree resin; chiefly polymerized diterpenoid resin (succinite)

Fossilized tooth fragment, possibly a mammalian tooth

Indeterminate fossil tooth; enamel and dentine, taxon not identifiable from this fragment

Fossil Shell

Phylum Mollusca (Gastropod fossil)

Tiger's Eye (Tumbled)

Silicified Riebeckite (SiO2 with Iron inclusions)

Petrified wood

Silicified wood; commonly quartz (SiO₂) replacing original woody tissue

Ironstone Nodule / Limonite Concretion

Iron-rich sedimentary concretion (FeO(OH)·nH2O / Fe2O3)

Fossil shark tooth

Likely fossilized shark tooth, possibly Carcharhinus or a related requiem shark

Amber (likely a small polished amber piece)

Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.

Mixed rock and mineral collection

Multiple specimens; visible examples may include quartz (SiO₂), amethyst (quartz), calcite (CaCO₃), and dark mafic rocks

Amber

Succinite (Formula: C10H16O)

Fossilized Coral

Hexagonaria (Rugose and Tabulate coral fossils)

Fossilized Shark Teeth

Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)

Fossil crocodilian skull and jaws

Crocodyliform fossil; exact genus and species cannot be determined from the image

Amber beads

Amber, fossilized plant resin; largely polymerized terpenoid resin (not a mineral)

Chert

Microcrystalline quartz (SiO2)

Banded gneiss

Gneiss, typically quartz–feldspar–mica assemblage

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Sandstone Pebble

Arenite (SiO2 with minor mineral cements)

Sandstone (Ferruginous)

Arenite with Iron Oxide staining (Fe2O3)

Sandstone

Clastic Sedimentary Rock (composed of SiO2 grains)

Fossilized Shark Tooth

Selachimorpha fossil (varies by species)

Sandstone

Arenite (SiO2 based)

Fossilized Brachiopod

Phylum Brachiopoda (Calcium Carbonate/Silica replacement)

Fossilized Brachiopod

Brachiopoda (Class Rhynchonellata or Spiriferida)

Fossilized Brachiopod

Brachiopoda (e.g., Rhynchonellida or Spiriferida)

Fossil Assortment and Geological Specimens

Various (including Ammonoidea)

Petoskey Stone (Fossilized Rugose Coral)

Hexagonaria percarinata

Fossilized Brachiopod

Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)

Fossilized Blastoid

Pentremites (Class Blastoidea)

Fossilized Brachiopod

Articulata (Class) / Brachiopoda (Phylum)

Coprolite

Fossilized feces (various taxa)

Fossilized Coral

Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)