Organic Crystal (Mineraloid)

Banded Chert with Quartz Veining

Microcrystalline Quartz (SiO2)

Amber

Succinite (Formula: C10H16O)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Limonite (Iron Ore)

Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (often called Flint in this context)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Moss Agate

Chalcedony (Silicon Dioxide) with inclusions - SiO2

Agatized Fossil or Chalcedony Nodule

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (often called Jasper or River Rock)

Chert (SiO2)

Chert (Jasper/Jasperoid)

Chert (chemically precipitated microcrystalline Quartz, SiO2)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Chert (and Chert-based Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Chert / Flint)

Silicon Dioxide (SiO2)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (with Quartz Veining)

Microcrystalline silicon dioxide (SiO2)

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper)

Cryptocrystalline quartz (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Quartz Variety)

Chert (SiO2)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Jasper with Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Petrified Wood

Silicon Dioxide (SiO2) - Calcified / Silicified Wood

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Chert (specifically Red Chert/Jasper nodule)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Quartzite river stone)

Microcrystalline Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Flower Jasper

Agatized Fossil Coral / Chalcedony (SiO2)

Chert (specifically Jasper/Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Red Chert/Jasper variety)

Silicon Dioxide (SiO2)