Biogenic Material

Calcite

Calcite (CaCO3)

Kidney Stone (Medical Specimen)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Popcorn

Zea mays everta (P. Wilson) (Botanical name for the corn variety)

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Chert

Chert (microcrystalline quartz, SiO2)

Tumbled coral limestone

Biogenic calcarenite/coral limestone, predominantly calcium carbonate (CaCO₃; calcite/aragonite)

Weathered fossil shell fragment

Likely a bivalve or gastropod shell, composed mainly of biogenic calcite/aragonite (CaCO₃)

Calcite (likely a tumbled specimen)

Calcite (CaCO 3 )

Fossiliferous limestone pebble (probable coral or shell fossil)

Calcite (CaCO₃), commonly biogenic limestone; exact fossil taxon indeterminate from the image

Coral limestone / fossil coral

Biogenic calcium carbonate, chiefly aragonite or calcite (CaCO₃); likely fossilized colonial coral

Calcite

Calcite (CaCO₃)

Fossilized shell or bone fragment

Indeterminate biogenic carbonate/phosphate fossil; likely a fragment of fossil shell or small vertebrate bone

Cockle Shell (Fossil or Recent)

Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)

Banded Iron Formation (BIF) with potential Stromatolite/Biogenic Trace

Ferruginous Chert / Banded Iron Formation (BIF)

Fossilized Shark Tooth (Cretaceous to Neogene)

Elasmobranchii dental fossil (likely Squalicorax or similar species)

Chert (or possibly Flint)

SiO2 (Silicon Dioxide)

Amber Inlay Jewelry

Fossilized Resin (C10H16O)

Rhinestone

Artificial Glass/Crystal

Chert (Jasper or Flint variant)

Chert (composed of microcrystalline quartz, SiO2)

Petrified Wood

Petrified Wood (Silicified Wood)

Petrified Wood

Fossilized plant material (Silicon dioxide - SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Agatized or Silicified Wood (SiO2)

Petrified Wood

Agatized or Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (Permineralized wood)

Petrified Wood

Silicified Wood

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Petrified Wood

Fossilized wood, permineralized wood (typically composed of SiO2)

Pale quartz-rich stone, possibly calcite

Likely quartz (SiO₂) or calcite (CaCO₃); image resolution prevents confident separation

Petrified Wood

Fossilized wood / Silicified wood

Likely red jasper or iron-rich chert fragments

Microcrystalline quartz (SiO₂), colored by hematite/goethite; exact identification requires testing

Fossilized wood fragment

Petrified wood; commonly silicified fossil wood (SiO₂ replacing organic tissue)

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Fossilized bivalve shell fragment

Calcitic shell material, commonly Arca or related marine bivalve; primarily CaCO₃

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone

Sandstone (SiO2-rich clastic sedimentary rock)

Polished Bumblebee jasper

Bumblebee jasper (calcite–orpiment/realgar-rich volcanic material; composition varies)

Tiger’s-eye (likely a polished or carved tiger’s-eye piece)

Quartz variety with fibrous crocidolite-replacement structure; SiO₂

Granite / Gneiss (Coarse-Grained Felsic Rock)

Granite (Quartz-Feldspar-Mica aggregate)

Gastropod shell fragment

Calcareous mollusk shell; primarily aragonite or calcite (CaCO₃)

Granite (Unakite / Feldspar-rich Granite)

Granite (composed of Potassium Feldspar, Quartz, and Biotite/Epidote)

Quartz-bearing pegmatitic rock, likely quartz–feldspar–mica specimen

Granitic pegmatite; primarily quartz (SiO₂), feldspar, and mica, with possible iron-oxide staining