Mineral Or Sedimentary Rock (With Mineral Inclusions)

Quartz Pebble (Citrine-colored or Stained Quartz)

Silicon Dioxide (SiO2)

Quartz Geode

Crystalline Quartz (Silicon Dioxide, SiO2)

Granite

Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)

Tree Agate

Silicon Dioxide with Chlorite inclusions (SiO2)

Red Jasper (Skull Carving)

Jasper, a cryptocrystalline variety of Quartz (SiO2)

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Sandstone with Iron Concretion

Arenite with Limonite/Goethite Concretion

Banded Sandstone

Arenite (with iron oxide banding)

Granite

Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Quartz (River Pebble)

Quartz (SiO₂ - Silicon Dioxide)

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions

Sandstone (Banded)

Clastic Sedimentary Rock: Arenite

Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Milky Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)

Schist

Crystalline Schist (often containing Muscovite, Biotte, or Quartz)

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities

Quartz (Milky Variant)

Quartz (Silicon Dioxide, SiO2)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Scoria (Lava Rock)

Scoria (Vesicular Basaltic Rock)

Milky Quartz

Silicon Dioxide (SiO2)

Limestone

CaCO3 (principally Calcite)

Shale (sub-type: Carbonaceous Shale)

Lutaceous Sedimentary Rock

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Granite Cobble

Phaneritic Plutonic Felsic Rock

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orbicular Jasper (Ocean Jasper variant)

Silicon Dioxide (SiO2) with iron oxide inclusions

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with secondary mineral infilling)

Quartz (with inclusions / Sandstone fragment)

Silicon Dioxide (SiO2)

Grey River Stone (Gneiss/Schist mix)

Foliated Metamorphic Rock (variable mineral formula)

Tree Agate (Dendritic Agate/Quartz)

Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite, Sodalite, Calcite, and Pyrite)