Metamorphic (Pseudo Igneous)

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Gneiss

Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)

Quartz (in a rock matrix)

Quartz (SiO2)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Epidote in Granite Gneiss

Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))

Greenschist with Quartz Veining

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Greenstone with Quartz Veining

Epidiorite or Metabasalt with SiO2 (Quartz) veins

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

Biotite Schist

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Greenschist (Chlorite Schist)

Greenschist (Metamorphic rock dominated by chlorite, actinolite, and epidote)

Gneiss

High-grade Metamorphic Gneiss

Gneiss

Gneiss (High-grade metamorphic rock)

Epidote

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Quartz

Quartz (SiO₂)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Garnet (Almandine or Spessartine likely)

Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Quartz in Matrix (possibly with Biotite or Hornblende)

Quartz (Silicon Dioxide, SiO2) in Granitic Matrix

Gneiss (Stream-worn Cobble)

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

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Gneiss (with Quartz and Mica)

Gneiss

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Gneiss

Metamorphic rock of high-grade regional metamorphism

Gneiss

Gneiss (High-grade metamorphic rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8

River Quartz Pitting/Cobble

Silicon Dioxide (SiO2)

Garnet (Almandine/Pyrope)

Silicate Mineral (Group: X3Y2(SiO4)3 where X=Mg, Fe, Mn and Y=Al, Fe, Cr)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)