Mineral (Or Mineraloid If Microcrystalline)

Dendritic Agate (Tumbled)

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Jasper with Agate Inclusions

Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate

Septarian Nodule Segment (Turtle Stone)

Septarian Concretion (CaCO3 with Siderite or Calcite infill)

Jasper

Silicon dioxide (SiO2) with impurities

Agate (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide with Iron Oxide (SiO2)

Jasper in Basalt Matrix

Silicon Dioxide (SiO2) with impurities; Chalcedony

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Chert (Tripolitic Chert / Flint Nodules)

Microcrystalline Quartz (SiO2)

Chrysocolla in Quartz (Gem Silica)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)

Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Jasper (Multi-color Chert)

Silicon dioxide (SiO2)

Aventurine (Green)

Silicon Dioxide (Quartz with inclusions of Fuchsite)

Jasper containing epidote (Unakite-like)

Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Dalmatian Jasper

Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions

Blue Lace Agate

Silicon Dioxide (SiO2)

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Picture Jasper

Silicified sedimentary or volcanic rock (primarily SiO2)

Red Jasper

Microcrystalline quartz (SiO2) with Hematite (Fe2O3) impurities

Jasper

Jasper (Silicate - SiO2)

Zebra Jasper

Silicon Dioxide (SiO2) with iron oxide and manganese inclusions

Dendritic Agate (also known as Dendritic Siltstone or Mudstone)

Silicon Dioxide with Manganese/Iron Oxide inclusions (SiO2 + MnO2)

Yellow Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Banded Iron Formation (BIF)

Banded Iron Formation

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral inclusions

Chalcedony (Botryoidal/Drusy Quartz)

Silicon Dioxide (SiO₂)

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Chert (often colloquially called Flint)

Chert (Microcrystalline Quartz, SiO2)

Pink Quartzite

Quartzite (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Ferruginous Quartz (Iron-stained Quartzite)

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper (within host rock)

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Sandstone Chert Concretion

Silica-cemented Concretion (primarily SiO2)

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Massive Quartz with Host Rock

Silicon Dioxide (SiO2)

Chert (specifically Jasper or Flint variant)

Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (Flint variety)

Microcrystalline context of Quartz (SiO2)

Green Aventurine

Silicon dioxide (SiO2) with fuchsite inclusions

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)