Mineral Variant

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Sandstone (Greywacke/Siltstone variant)

Clastic Sedimentary Rock (Lithic Wacke)

Chalcedony (Moonstone variant or White Agate)

Silicon Dioxide (SiO₂)

Chert (Red Jasper variant)

Microcrystalline Quartz (SiO2)

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)

Granite (White Granite variant)

Phaneritic Plutonic Rock (High-silica Felsic)

Chalcedony (Common Opal variant or Chert/Flint)

Silicon Dioxide (SiO2)

Chalcedony (Common Opal variant or Quartz)

Silicon Dioxide (SiO2)

Yellow Chert (Gold-toned Jasper)

Silicon Dioxide (SiO2)

Pegmatite (White Granite variant)

Pegmatitic Granite (Quartz and Feldspar rich)

Chert (specifically Yellow or Brown Chert / Jasper)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Golden Sheen Obsidian

Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

Chert (Nodule)

Chert (Alpha-Quartz, SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (often called Flint)

Chert (SiO2)

Porphyritic Basalt (Peanut Obsidian/Star Galaxy-style)

Porphyritic Basalt (Silica-rich Volcanic Rock)

Granite

Granite (phaneritic intrusive igneous rock consisting of 20-60% quartz, orthoclase/plagioclase feldspar, and mica/amphibole)

Sunstone

Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8

Chert Pebble (Jasper variant)

Microcrystalline Quartz (SiO2)

Obsidian

Obsidian (principally SiO2)

Dragon Blood Jasper

Epidote with Red Piedmontite (Chalcedony/Quartz variant)

Chalk (Limestone variant)

Calcium Carbonate (CaCO3)

Chert (variant Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Flint variant)

Microcrystalline Quartz (SiO2)

Chert (variant Flint)

Silicon Dioxide (SiO2)

Granite (Dioritic variant)

Granite (Phaneritic Igneous Rock)

Chert (and Flint variant)

Silicon Dioxide (SiO2)

Chert (and Flint variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (variant Flint)

Silicon Dioxide (SiO2)

Chert (Flint/Jasper variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Flesh-colored Quartzite

Quartzite (SiO2)

Chert (Arrowhead Debitage or Flake)

Microcrystalline silica (SiO2)

Banded Iron Formation (Red Jasper and Hematite Chert)

Banded Iron Formation (BIF); Fe2O3 (Hematite) + SiO2 (Quartz/Jasper)

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Common Opal variant)

Silicon Dioxide (SiO2)

Agate and Amethyst (Quartz variants)

Silicon Dioxide (SiO2) - Microcrystalline Quartz and Crystalline Quartz

Amethyst and Citrine (Quartz variants)

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)

Granite (including Pegmatite variants)

Phaneritic Plutonic Rock (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Muscovite mica)