Mineral, Often Found As A Rock (Metamorphic)

Quartzite

Quartzite (SiO2)

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Mica Schist

Mica Schist

Red Tiger's Eye

Silicified Crocidolite (Quartz pseudo-morph after Crocidolite), SiO2

Schist

Schist (various mineral compositions)

Lapis Lazuli (polished cabochon)

Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)

Quartzite (clastic/metamorphic subtype)

Quartzite (primarily Silicon Dioxide, SiO2)

Yellow Quartzite or Yellow Jasper

Quartzite (primarily SiO2 with Iron oxide staining)

Chert (specifically Iron-stained River Cobble)

Silicon Dioxide (SiO2)

Blue Aventurine

Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar

Serpentine

Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite

Quartzite (primarily Silicon Dioxide - SiO2)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Biotite Mica

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

Ferruginous Quartzite (Red Quartz)

Quartzite (SiO2 with Hematite/Iron impurities)

Serpentinite

Serpentinite (complex of Antigorite, Lizardite, and Chrysotile, Mg3Si2O5(OH)4)

Gneiss

High-grade metamorphic rock (Gneiss)

Greenschist (Greenstone)

Chlorite Schist / Greenschist Facies Rock

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite River Rock

Quartzite (SiO2)

Quartzite (Tumbled Pebble)

Metamorphosed Quartz Sandstone (SiO2)

River Stone (likely Quartzite or Chert)

Recrystallized Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (pronounced "nice")

Serpentine

Antigorite / Lizardite / Chrysotile (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Pink Quartzite

Quartzite (mainly SiO2 with iron oxide impurities)

Red Quartzite / Ferruginous Quartzite

Quartzite (primarily SiO2 with Fe2O3 inclusions)

Feldspar

Potassium Feldspar (KAlSi3O8)

Green Quartzite (or Aventurine)

SiO2 (Silicon Dioxide) primarily, with Fuchsite inclusions (K(Al,Cr)2AlSi3O10(OH)2)

Red Quartzite Cobble

Quartzite (primarily SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Gneiss

Metamorphic rock of high-grade regional metamorphism

Serpentinite

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

River Cobble (Quartzite with Iron Staining)

Metamorphic Quartzite (SiO2 with Fe2O3 inclusions)

Quartzite

Quartzite (composed mainly of SiO2)

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Marble

Recrystallized Calcite (CaCO3) Rock

Kyanite

Kyanite (Al2SiO5)