Mineral (Found In Igneous And Metamorphic Rocks)

Blue polished/tumbled stone, likely blue apatite or dyed quartz

Apatite-group mineral, commonly fluorapatite (Ca5(PO4)3F); exact identification requires testing

Citrine Quartz

Silicon Dioxide (SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Citrine

Silicon Dioxide (SiO₂)

Likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly quartz-rich rock or calcite

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Corundum (Sapphire)

Corundum (Al2O3)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

White quartz-rich rock, possibly milky quartz

Quartz (SiO₂), likely massive milky quartz; identification is uncertain from the image

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (River Cobble)

Silicon Dioxide (SiO2)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Mixed collection of quartz-rich rocks and minerals

Quartz (SiO₂), with some pieces possibly containing feldspar or mica; exact identification is uncertain from the image

White Calcite

Calcium Carbonate (CaCO3)

Rainbow Moonstone

White Labradorite (formula: (Na,Ca)(Al,Si)4O8)

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Black Tourmaline (Schorl)

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Sunstone

Plagioclase Feldspar (Na,Ca)(Si,Al)3O8

Milky quartz (likely quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

Apatite

Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Lemon Quartz (Orizaba/Citrinated Quartz)

Silicon Dioxide (SiO2) with iron impurities/treatment

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz (massive milky quartz)

Quartz, silicon dioxide (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Possible hematite- or magnetite-rich rock

Likely iron oxide, chiefly hematite (Fe₂O₃) and/or magnetite (Fe₃O₄); exact identification requires testing

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Mica

Phyllosilicate (group name), typically Muscovite KAl2(AlSi3O10)(OH)2 or Biotite K(Mg,Fe)3(AlSi3O10)(OH)2