Mineral Variant

Serpentine

Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4

Chert (often called Flint)

Chert (SiO2)

Porphyritic Basalt (Peanut Obsidian/Star Galaxy-style)

Porphyritic Basalt (Silica-rich Volcanic Rock)

Chert (and Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Smoky/Grey Quartz Variant)

Silicon Dioxide (SiO2)

Obsidian

Obsidian (principally SiO2)

Chrysocolla in Quartz (Quantum Quattro variant)

Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2

Clear Quartz (Herkimer Diamond variant)

Silicon Dioxide (SiO2)

Beryl (likely Aquamarine or Heliodor variant)

Beryllium aluminum cyclosilicate (Be3Al2Si6O18)

Argetine Blue Agate (Chalcendony variant)

Silicon Dioxide (SiO₂)

Sandstone (specifically Arkose or Siltstone variant)

Clastic Sedimentary Rock (primarily SiO2)

Basalt (Phaneritic or Diabase)

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Hardened Gray Mudstone

Argillite / Silicified Mudstone (principally SiO2 and Al2Si2O5(OH)4)

Chert (Nodule)

Chert (Alpha-Quartz, SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Amethyst (Ametrine or Bicolor Quartz variant)

Silicon Dioxide (SiO2) with iron impurities

Quartz (Iron-stained or Rose variant)

Silicon Dioxide (SiO2)

Chert (Common Opal/Jasper variant)

Silicon Dioxide (SiO2)

Pink Quartz (Rose Quartz variant)

Silicon Dioxide (SiO2)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Agate (Plume or Moss Agate variant)

Chalcedony (SiO2) with various inclusions

Chert (Flint/Jasper variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Flesh-colored Quartzite

Quartzite (SiO2)

Beryl (likely Aquamarine or Heliodor variant)

Beryllium aluminum silicate (Be3Al2Si6O18)

Chalcedony (Common Opal or Agate variant)

Silicon dioxide (SiO2) with trace hydration

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Yellow Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO₂)

Lapis Lazuli

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

Epidote in Matrix (Dragon Stone variant)

Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))

Sandstone (Green/Yellow Siltstone variant)

Arenite or Siltstone (primarily SiO2 with mineral staining)

Septarian Nodule (Thunder Egg variant)

Septarian concretion (Calcite, Aragonite, and Limestone)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 based)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 dominated)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint nodule)

Silicon dioxide (SiO2)

Chert (Common Opal or Flint variant)

Microcrystalline Quartz (SiO2)

Snowflake Obsidian (Flower Jasper variant)

Vitreous volcanic silicate with cristobalite inclusions

Chert

Microcrystalline Quartz (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)