Metamorphic Rock (Composed Of Multiple Minerals)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Prase quartz with actinolite inclusions

Silicon dioxide (SiO2) with Calcium Magnesium Iron Silicate Hydroxide inclusions

Jadeite

Jadeite (NaAlSi2O6)

Yellow Calcite

Calcium Carbonate (CaCO3)

Vesicular Basalt (Iron-Stained)

Mafic Volcanic Rock (Basalt)

Milky Quartz

Silicon Dioxide (SiO2)

River Pebble (Gabbro or Basalt)

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Bituminous Coal

Organic Sedimentary Rock (composed mostly of carbon with sulfur and hydrogen)

Blue Quartzite (Aventurine)

Silicon Dioxide (SiO2) with Dumortierite or Crocidolite inclusions

Ferruginous Quartzite (also known as Ironstone or Gossan)

Ferruginous Quartzite with Goethite/Hematite staining

Orange Quartzite / Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Schist

Mica Schist

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz (likely macrocrystalline variety)

Quartz (SiO₂)

Granitic Pegmatite with Muscovite Mica

Pegmatite (containing KAl2(AlSi3O10)(OH)2)

Milky Quartz

Silicon Dioxide (SiO2)

Graphite

Graphite (Native Carbon, C)

Greenstone / Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Blue Apatite

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

Coarse Sand Grain / Lithic Fragment

Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)

White Marble

Recrystallized Calcite (CaCO3)

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

White Quartz

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Agate (Laguna or Lace variety pattern)

Silicon Dioxide (SiO2)

Jasper in Basalt Matrix

Silicon Dioxide (SiO2) with impurities; Chalcedony

Magnetite (potentially as a Lodestone or within Ironstone)

Magnetite (Fe3O4)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine in Host Rock

SiO2 (Quartz with Fuchsite inclusions)

Unakite (Tumbled)

Unakite (altered granite)

Quartz

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3)

Sapphire

Corundum (Al2O3)

Epidosite (Epidote-rich rock)

Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))

Unakite

Unakite (Epidotized Granite)