Mineral (Biogenic)

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite

Hydrothermal Quartz or Quartzite (SiO2)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Demitasse Granite (Diorite-Granite transition)

Intermediate Plutonic Rock (Granodiorite/Diorite mix)

Lapis Lazuli

Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartz (Milky/Crystal variety)

Silicon Dioxide (SiO2)

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Amygdaloidal Basalt

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Chrysocolla in Cuprite (Sonoran Sunrise)

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

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Citrine Quartz

Silicon Dioxide (SiO2)

Peridot

Olivine (Mg, Fe)2SiO4

Citrine

Crystalline Quartz (SiO2) with iron impurities

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)

Milky Quartz with Country Rock contact

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

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)

Granite Pegmatite

Phaneritic Plutonic Igneous Rock

Quartz Druzy on Matrix (with Copper Mineralization)

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

Tiger's Eye (Brown/Dark variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Lapis Lazuli (polished cabochon/sphere)

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

Sandstone

Arenite

Jasper

Jasper (Silicate mineral, SiO2)

Aragonite

Aragonite (Carbonate mineral), CaCO3

Jasper

Jasper (Silicate mineral, SiO2)

Chert (Jasper variation)

Chert (Silicate mineral, SiO2)

Banded Gneiss

Gneiss (variable mineral composition)

Sandstone (likely Quartzose)

Arenite (SiO2 principal mineral)

Quartzite

Quartzite (Primary mineral: SiO2)

Amethyst

Amethyst (Silica mineral, SiO2)