Mineral Simulant (Synthetic Glass)

Yellow-brown quartz/chalcedony fragment

Quartz, SiO₂; likely microcrystalline chalcedony with iron-oxide staining

Sandstone (Banded)

Arenite

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartzite with Schist layers

Metamorphosed Quartz-rich Rock (Mixed Schist/Quartzite)

Sandstone

Arenite (mainly SiO2 with varying cements)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Sedimentary Rock (Quartz arenite or arkose)

Quartz crystals on matrix

Silicon dioxide (SiO2)

Quartz (Milky or Iron-stained)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO₂)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

White Quartz

Silicon Dioxide (SiO2)

Quartz (Raw / Unpolished)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky quartz fragment

Quartz, silicon dioxide (SiO₂), smoky variety

Pegmatite (Quartz with Tourmaline/Biotite inclusions)

Igneous Pegmatite

Lepidolite

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

Pink Orthoclase Feldspar with Dendrites

Orthoclase (KAlSi3O8) with Manganese Oxide dendrites

Celestine (or Celestite) on Matrix

Celestine (SrSO4)

Milky Quartz

Silicon Dioxide (SiO2)

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Rough Quartz (Milky / Clear Quartz)

Silicon Dioxide (SiO2)

Tumbled milky quartz (likely chalcedony or quartzite)

Quartz/chalcedony, silicon dioxide (SiO₂)

Amethyst geode/druse

Quartz, SiO₂; purple variety amethyst

Tumbled Amethyst

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation

Tumbled Agate and Chalcedony

Cryptocrystalline Quartz (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron

Quartz (Bull Quartz)

Silicon Dioxide (SiO2)

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (silicon dioxide, SiO₂); if granular and foliated, likely quartzite

Rough Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Black Obsidian

Obsidian (Volcanic Glass)

Obsidian

Obsidian (Volcanic Glass)

Amethyst (with Pyrite and other minerals)

Silicon Dioxide (SiO2)