Mineral (Native Element Alloy)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Quartzite with Quartz Geode / Vug

Crystalline Silicon Dioxide (SiO2) in Metamorphic Host

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Peridot

Olivine (Mg, Fe)2SiO4

Citrine Quartz

Silicon Dioxide (SiO2)

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Citrine

Crystalline Quartz (SiO2) with iron impurities

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Chrysocolla in Cuprite (Sonoran Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolites, Calcite, or Quartz)

Schist

Schist (Crystalline metamorphic rock)

Granite

Granite (Felsic Plutonic Rock)

Basalt (River Rock/Cobble)

Basalt (no specific mineral formula as it's a rock)

Olivine in Basalt matrix

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Milky Quartz with Country Rock contact

Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Druzy on Matrix (with Copper Mineralization)

Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Tiger's Eye (Brown/Dark variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Zircon

Zircon (ZrSiO4)

Granite

Granite (Felsic Plutonic Rock)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Geode

Crystalline Quartz (Silicon Dioxide, SiO2)

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)

Jasper

Jasper (Silicate mineral, SiO2)

Jasper

Jasper (Silicate mineral, SiO2)

Aragonite

Aragonite (Carbonate mineral), CaCO3

Pearl

Organic Mineral (CaCO3 with conchiolin)

Chert (Jasper variation)

Chert (Silicate mineral, SiO2)

Quartzite

Quartzite (Primary mineral: SiO2)

Banded Gneiss

Gneiss (variable mineral composition)

Sandstone (likely Quartzose)

Arenite (SiO2 principal mineral)

Amethyst

Amethyst (Silica mineral, SiO2)

Sandstone

Sandstone (various mineral compositions)

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Schist

Schist (various mineral compositions)