Mineral And Metamorphic Rock

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Amethyst

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

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Magnetite (potentially as a Lodestone or within Ironstone)

Magnetite (Fe3O4)

Mica Schist

Mica Schist (Quartz-Biotit-Muscovite Schist)

Lapis Lazuli

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

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite

Silica (SiO2)

Tumbled gray feldspar-rich stone, possibly granite or quartzite

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

Quartz Fragment

Silicon Dioxide (SiO2)

Milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite with Chlorite

Metamorphic Quartzite (SiO2) with phyllosilicates

Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartzite

Quartzite (Metamorphic rock composed primarily of quartz)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Biotite Mica

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

Quartzite

Quartzite (Primary mineral: SiO2)

Gneiss (Stream-worn Cobble)

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

Banded Gneiss

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

Schist (Garnet-Mica Schist)

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

Vesicular Basalt with Zeolite

Mafic volcanic rock with Hydrated Aluminosilicate minerals (Zeolite group)

Banded Gneiss

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

Quartz Mica Schist

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

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Gneiss with Quartz Vein

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

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

Iron-stained quartz vein rock

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

Fulgurite

Fulgurite (Lechatelierite)

Quartz with Schist Inclusion

Quartz (SiO2) with micaceous schist inclusions

Greenstone / Quartzite Pebble

Metamorphosed Quartz-rich Rock

Tiger's Eye

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

Quartz Pebble

Silicon Dioxide (SiO2)

Rounded gray stone, likely slate or fine-grained sandstone

Probable slate (low-grade metamorphosed shale) or lithic sandstone; exact identification requires testing

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), likely massive milky quartz

Quartz on Host Rock

Silicon Dioxide (SiO2)

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment