Mineral In Metamorphic Rock

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Serpentinite

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

Quartz-rich breccia or vein quartz fragment

Quartz (SiO₂), likely with iron-oxide staining and attached host rock

Eclogite

Eclogite (Omphacite-Garnet Metamorphic Rock)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Quartz/Schist

Clear Quartz

Silicon Dioxide (SiO2)

Unakite

Epidotized Granite

Quartzite

Quartzite (SiO2)

Greenstone / Greenschist

Metamorphosed mafic igneous rock (Greenschist facies)

Granite Gneiss

Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Calcite

Calcite (CaCO₃, Calcium Carbonate)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

River Cobble (Gneiss/Migmatite)

Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Serpentine

Antigorite, Lizardite, or Chrysotile; (Mg, Fe)3Si2O5(OH)4

Unakite

Epidotized Granite

Greenstone (Celadonite-bearing Volcanic)

Hydrothermally altered basalt or andesite with Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)

Quartzite with Iron Inclusions

Metamorphosed Quartz-rich Rock (SiO2 with Fe2O3)

Granite cobble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Wishing Stone with Quartz Veins

Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)

Red Quartzite (River Pebble)

Quartzite (primarily Silicon Dioxide - SiO2)

Greenstone / Graywacke

Metagraywacke (Chlorite-grade schistose rock)

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Polished green stone, likely serpentine or altered basalt

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing

Quartz / Quartzite

Silicon Dioxide (SiO2)

Gneiss (Banded Gneiss)

Gneiss

Lapis Lazuli

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

Milky Quartz with Matrix

Silicon Dioxide (SiO2)

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Green Quartzite

Quartzite (primarily SiO2 with chromium-rich mica/fuchsite impurities)

Red Quartzite

Tectonically compressed Quartz-rich rock (SiO2)

Tiger's Eye

Silicon dioxide with crocidolite fibers (SiO2 with chrysotile amphibole inclusions)

Serpentine

(Mg,Fe)3Si2O5(OH)4

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)

Blue Quartzite (Dyed)

Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)

Lapis Lazuli (Lazurite crystals on Marble)

Lazurite / (Na,Ca)8[(S,Cl,SO4,OH)2|(AlSiO4)6]

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Banded Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz