Mineral (Organic)

Limonite (Ironstone)

Limonite (FeO(OH)·nH2O)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Limonite (Iron-rich Siltstone / Sandstone base)

Hydrous ferric oxide mixture (FeO(OH)·nH2O)

Limonite (with Pyrite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Sandstone (Tumbled/River Pebble)

Arenite (composed primarily of SiO2)

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)

Chrysocolla in Cuprite (Sonoran Sunrise)

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

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Granite

Granite (Felsic Plutonic Rock)

Basalt (River Rock/Cobble)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

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

Tiger's Eye (Brown/Dark variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

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)

River Stone / Pebble

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Sandstone

Arenite

Lapis Lazuli (polished cabochon/sphere)

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

Jasper

Jasper (Silicate mineral, SiO2)

Aragonite

Aragonite (Carbonate mineral), CaCO3