Calcite (likely chalky calcite fragment)
Calcite, calcium carbonate (CaCO₃)
mineral
Category
Mineral Like Biological Tissue
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Amber
Succinite (with formula approximately C10H16O)
Organic mineraloid
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Hag Stone (Odin Stone / Adder Stone)
Perforated Pebble (commonly Chert, Mudstone, or Limestone)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Oak Wood (Wood Grain Pattern)
Quercus (genus)
Organic (Non-rock)
Aragonite
Aragonite (CaCO3)
mineral
Fossil shark teeth
Likely fossilized shark teeth, possibly Carcharhiniformes or related sharks; exact species cannot be determined from the photo.
fossil
Limestone Gravel
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite
Mineraloid
Amber
Succinite (Fossilized Tree Resin) - C10H16O
mineral
Piddock-bored Mudstone
Lutite (Siltstone or Mudstone) with Pholad borings
sedimentary
Dinosaur Bone (Gembone)
Silicified Dinosaur Bone (SiO2 replacing organic tissue)
sedimentary
Fossiliferous Limestone / Fossil Fragment
Calcium Carbonate Matrix with Biogenic Inclusions (CaCO3)
fossil
Biological Specimen (Domestic Dog)
Canis lupus familiaris
Organic (Non-rock)
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinite (C10H16O)
mineraloid
River Cobble with Algae Patina
Weathered Chert or Quartzite pebble (SiO2 dominated)
sedimentary
Calcite
Calcite (CaCO3)
Mineral
Fossiliferous Limestone
Calcareous biomicrite / Calcium Carbonate (CaCO3)
sedimentary
Chert (often called Flint or River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Coralline Algae / Maerl
Lithothamnion (Biogenic Calcium Carbonate)
sedimentary
Hag Stone
Perforated Sandstone (composed of SiO2 and calcareous cement)
sedimentary
Amber (or polished Chalcedony bead)
Fossilized Tree Resin / SiO2 (Silicon Dioxide if Chalcedony)
gemstone
Jasper (Milky/Cream Variety)
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary (chemical/biological)
Basalt with Desert Varnish
Mafic Volcanic Rock (Fe/Mg rich silica)
igneous
Bivalve Fossil (Clam/Mollusk)
Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)
sedimentary
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
mineral
Dinosaur Bone (Petrified/Agatized)
Permineralized Dinosauria Bone (Silicate Replacement)
fossil
Fossiliferous Limestone (Coral Fossil)
Scleractinian Coral in Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
gemstone
Crinoid Stem Fossil
Class Crinoidea (Phylum Echinodermata), primarily Calcium Carbonate (CaCO3)
sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary
Marble (Sculptural Statue)
Metamorphic Limestone (CaCO3)
metamorphic
Pearls
Aragonite (calcium carbonate) and Conchiolin
Mineraloid
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with organic fossil inclusions
sedimentary
Limestone with Lichen
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Desert Varnish (on Sandstone)
Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
Anthropogenic Sedimentary-style Organic Solid