Mineral In Metamorphic Rock

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Quartzite Pebble

Quartzite (SiO2) with mineral inclusions

Serpentine

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

River Stones (Quartzite and Sandstone)

Quartzite / Sedimentary Rock (SiO2 dominant)

Milky quartz-rich rock

Quartz (SiO₂), likely massive milky quartz with minor iron-oxide staining and attached host material

Blue Sapphire

Corundum (Al2O3)

Sapphire

Corundum (Al2O3)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Green Quartzite (Tumbled)

Metamorphosed Quartz-rich Sandstone

Milky quartz (likely weathered quartzite or quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Gneiss

Gneiss

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Mica Schist

Mica Schist (Quartz-Biotit-Muscovite Schist)

Quartzite

Silica (SiO2)

Tumbled gray feldspar-rich stone, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, potentially fine-grained granite or quartzite

Magnetite (potentially as a Lodestone or within Ironstone)

Magnetite (Fe3O4)

Clear Quartz

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)

Milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartzite with Chlorite

Metamorphic Quartzite (SiO2) with phyllosilicates

Gneiss

Gneiss (High-grade regional metamorphic rock)

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Clear Quartz

Silicon Dioxide (SiO2)

Vesicular Basalt with Zeolite

Mafic volcanic rock with Hydrated Aluminosilicate minerals (Zeolite group)

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Quartzite

Quartzite (Metamorphic rock composed primarily of quartz)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite

Quartzite (Primary mineral: SiO2)

Gneiss (Stream-worn Cobble)

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

Schist (Garnet-Mica Schist)

Garnet-Mica Schist (X-Y)3Z2(SiO4)3

Pyrite in Slate

Iron Disulfide (FeS2) in Low-grade Metamorphic Rock

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Banded Gneiss

Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)

Iron-stained quartz vein rock

Milky quartz (SiO₂) with limonite/goethite iron oxides, possibly in altered host rock

Iron-stained quartz-rich rock, likely quartzite or silicified breccia

Quartz (SiO₂), possibly quartzite with limonite/goethite iron oxides

Fulgurite

Fulgurite (Lechatelierite)