Mineraloid (Organic)

Chert (and Limestone) River Cobble

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Chert (River Cobble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert / Flint

Chert (SiO2)

Chert (with Quartz Vein)

Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Chalky variety)

Microcrystalline Quartz (SiO2)

Picasso Jasper (or Picasso Marble)

Metamorphosed Limestone (Calcium Carbonate, CaCO3, with impurities)

Chert (often called Flint or River Stone)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (and/or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dinosaur Bone (Gembone)

Agatized Dinosaur Bone (Silicified Paleo-osteoid)

Fossilized Coral

Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Jasper (Petrified Wood Variety)

Silicon Dioxide (SiO2)

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth

Scapanorhynchus (Sand Tiger Shark relative)

Petrified Wood

Silicified Wood (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (Jasper variety)

Chert (SiO2)

Chert (specifically Gray/Tan Chert Node)

Microcrystalline Quartz (SiO2)

Glauconitic Sandstone (Greensand pebble)

Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Chert (varieties include Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and associated river cobbles)

Silicon dioxide (SiO2)

Chert Pebble

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (and Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (often called Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Yellow/Brown Jasper)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Chert Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Anthracite Coal

Anthracite (Carbon based fossil fuel)

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Red Jasper (possibly Petrified Wood)

Silicon Dioxide (SiO2) with Hematite inclusions

Anthracite Coal

Anthracite

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Dragon Stone

Ohko Stone (Argillaceous sedimentary rock)

Chert (specifically Flint or Common Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chert (specifically Iron-stained or Jasperoid Chert)

Microcrystalline Quartz (SiO2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with iron oxide and other mineral impurities