Synthetic Glass (Often Categorized As A Simulated Mineral)

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Septarian or Nodular variety)

Microcrystalline Quartz (SiO2)

Quartzite with Gneissic Banding

Quartzite (primarily SiO2) with mafic mineral inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide with Iron impurities (SiO2)

Quartzite (River Stone)

Quartzite (composed primarily of Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (primarily SiO2)

Chalcedony Nodule (Commonly known as Agate or Chert)

Microcrystalline Quartz (SiO2)

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Common Opal

Hydrated amorphous form of silica (SiO2·nH2O)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz (pebble)

Quartz (SiO₂)

Yellow Quartzite (Iron-Stained)

Quartzite (primarily SiO2 with iron oxide impurities)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)

Rose Quartz

SiO2 (Silicon Dioxide)

Milky Quartz Pebble

Silicon dioxide (SiO2)

Smoky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Green Quartz (Prasiolite/Adventurine/Jasper)

Silicon Dioxide (SiO2)

Rose Quartz

Quartz (SiO2) with trace impurities causing pink color

Chert (Jasper)

Microcrystalline Silica (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Agate (Geode nodule fragment)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Beryl (var. Heliodor or Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Onyx (Black Onyx)

Onyx (Silicon Dioxide, SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone (Ferruginous)

Arenite with Iron oxide staining (SiO2 with Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Sandstone (Quartzose)

Arenite (composed mainly of SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Blue Quartzite

Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite)

Quartzite

Quartzite (primarily SiO2)