Mineral (Or Mineraloid If Microcrystalline)

Chert (Flint Pebbles)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Green Quartzite (Aventurine-like)

Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)

Jasper

Jasper (Silicon Dioxide, SiO2)

Banded Agate (specifically Sardonyx)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Black Onyx

Silicon Dioxide (SiO2)

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Jasper

Silicon Dioxide (SiO2) with impurities

Petrified Wood

Silicified Wood (primarily SiO2)

Map Jasper (Picasso Stone)

Metamorphosed Calcium Carbonate (Crystalline Limestone or Marble with Silicate inclusions/impurities)

Red Ochre (Hematite-rich Clay)

Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)

Picture Jasper

Silicon dioxide (SiO2)

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Fossilized Wood (Petrified Wood)

Silicified Wood (primarily quartz/chalcedony replacing organic matter)

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral impurities

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (often referred to as 'Jasper' when red)

Chert (microcrystalline quartz, SiO₂)

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Aventurine (Green)

Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Agate (variety of Chalcedony)

Agate (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with impure Iron oxides

Jasper with Iron Staining

Silicon Dioxide (SiO2) with impurities

Quartzite

Quartzite (SiO2)

Ironstone Concretion (Limonite/Goethite)

Goethite-rich Concretion (FeO(OH))

Dinosaur Bone (Gembone)

Agatized Dinosaur Bone (Silicified Paleo-osteoid)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay inclusions

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions - SiO2)

Shale

Fissile mudstone (rich in clay minerals and quartz)

Green Onyx (Banded Calcite)

Travertine (CaCO3 - Calcium Carbonate)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Leopard Skin Jasper

Silicon Dioxide (SiO2) with various inclusions

Quartzite (Iron-stained)

Quartzite (primarily SiO2)

Yellow Jasper

Microcrystalline Quartz with Iron Oxide (SiO2)

Chert (often called Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Greenstone (metamorphosed basalt)

Greenschist / Meta-basalt

Yellow Jasper

Silicon Dioxide (SiO2)

Red Jasper

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

Green Quartzite

Quartzite (SiO2)