Man Made Mineral Simulant (Glass)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

Weathered sandstone or tuff fragment

Likely quartz-rich sandstone (SiO₂) or porous volcanic tuff; exact identification requires testing

Polished green aventurine

Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Twinning Specimen)

Orthoclase (KAlSi3O8)

Rose Quartz

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

Quartz (Milky/Snow)

Silicon Dioxide (SiO2)

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide - SiO2)

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Quartz-veined Granite or Gneiss Pebble

Silicate-rich metamorphic rock fragment

Quartz–feldspar–mica metamorphic rock, likely gneiss

Gneiss; composition commonly quartz (SiO₂), feldspars, biotite/hornblende, and minor accessory minerals

Sandstone

Arenite

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Milky Quartz Geode with Chlorite

Silicon Dioxide (SiO2) with Chlorite group inclusions

Potassium Feldspar

Orthoclase (KAlSi3O8)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Clear Quartz (Rock Crystal Fragments)

Silicon Dioxide (SiO2)

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Quartz Pebbles

Silicon Dioxide (SiO2)

Quartz (Small fragments)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartzite (with Quartz Veining)

Quartzite (SiO2)

Quartz Vein in Host Rock

Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)

Quartz Pebble

Silicon Dioxide (SiO2)

Brown Chert

Cryptocrystalline Silica (SiO2)

Quartz pebble

Silicon Dioxide (SiO2)

Lepidolite

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

Lepidolite

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Rose Quartz

Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock