Igneous, Sedimentary, Metamorphic

Citrine Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Limonite

FeO(OH)•nH2O

White Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Rock and Mineral Collection

Mixed Geological Specimens

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Limonite

FeO(OH)•nH2O

Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Green Aventurine

SiO2

Quartz vein fragment

Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂); if quartzite, recrystallized quartz sandstone

Likely quartz-rich stone (possibly milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Quartz Crystal

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Epidote

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

Magnetite

Magnetite (Fe3O4)

Quartz (Rose Quartz or Jasper variety)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

White Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)