Metamorphic Rock (Composed Of Multiple Minerals)

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Ventifact

Eolian Ventifact (often composed of basalt, chert, or quartzite)

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Banded Gneiss

Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)

Riverstone Quartzite (Water-worn Siltstone/Quartzite)

Metamorphosed Quartz-rich Arenite (SiO2)

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Red Quartzite River Rock

Metamorphic Quartzite (SiO2)

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group)

Unakite

Unakite (Metasomatized Granite)

Lapis Lazuli (Low Grade)

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

Orange Calcite (likely polished specimen)

Calcite

Quartzite Pebble

Quartzite (SiO2)

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Gneiss (High-Grade Metamorphic Rock)

Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Quartzite Pebble

Quartzite (mostly SiO2)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Quartzite River Cobble

Quartzite (SiO2)

Granite Gneiss

Felsic Gneiss (composed of Quartz, Feldspar, and Biotite)

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Slate

Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)

Quartzite (Yellow/Tan)

Metamorphic Rock composed of Quartz (SiO₂)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Granite

Granite (Phaneritic intrusive igneous rock)

Bauxite

Bauxite (Aluminum Ore)

Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Marble

Metamorphic Limestone (CaCO3)

Granite

Granite (Felsic Plutonic Rock)

Schist

Mica Schist

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Gneiss

Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)

River Stone / Pebble

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

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Bauxite (Laterite)

Hydrated aluminum oxides (Al2O3·nH2O)

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)