Organic Mineraloid And Mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Chert (Nodule)

Microcrystalline or Cryptocrystalline Silica (SiO2)

Chert (Gravel pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossiliferous Brachiopod in Shale

Brachiopoda (Phylum) preserved in Carbonaceous Shale

Chert (Chocolate or Brown Flint)

Chert (SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Iron-stained Quartzite)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Chert (SiO2)

Chert (variant Flint)

Silicon Dioxide (SiO2)

Chert (Cherty Flint/Jasper variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (often called Flint for darker varieties)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (variations include Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Anthracite Coal

Anthracite (Carbon based fossil fuel)

Chert (Iron-stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (often colloquially referred to as Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Chert (specifically Yellow Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone (Crinoidal)

Calcium Carbonate (CaCO3) - Limestone containing bioclasts

Fossiliferous Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (Yellow/Brown variety)

Chert (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (specifically Tan/Yellow Chert)

Silicon Dioxide (SiO2)

Fossil Coral

Fossilized Scleractinia or Tabulata (various genera/species)

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Ferruginous Sandstone (Ironstone)

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Chert (Jasper Variant likely)

Silicon Dioxide (SiO2)

Amber

Succinite (specifically for Baltic amber; fossilized tree resin)

Chert (Polished River Pebble)

Chert (SiO2)

Stromatolite (Jasper-replaced)

Fossilized Stromatolite (Cyanobacteria / Cryptozon / Silica SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Field Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Red/Pink Jasper subtype)

Silicon Dioxide (SiO2)

Chert (with Calcite Veining)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) veins