Mineral In Metamorphic Rock

Zircon

Zircon (Zirconium Silicate - ZrSiO4)

Quartz with Mica Schist Matrix

Quartz (SiO2) in Mica Schist Matrix

Garnet in Matrix

Almandine/Grossular Garnet in Pegmatite or Schist

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)

Quartz–feldspar–mica rock; exact identification requires testing

Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Milky quartz (quartz-rich rock)

Quartz, silicon dioxide (SiO₂); likely massive quartz with minor iron-stained impurities

Quartz with Oxides

Silicon Dioxide (SiO2)

Ruby in Kyanite

Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)

Serpentinite (likely)

Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and minor chlorite/talc

Glaucophane Schist

Glaucophane-bearing Schist (Na2(Mg,Fe)3Al2Si8O22(OH)2)

Gneissic granite / granitic gneiss

Quartz–feldspar–mica gneiss; composition commonly quartz (SiO₂), feldspars, and biotite/muscovite

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Ruby / Pink Sapphire

Corundum (Al2O3 with Chromium impurities)

Weathered green-gray stone, likely serpentinite or chlorite-rich metamorphic rock

Probable serpentinite (antigorite–lizardite), possibly chlorite schist or altered basalt

Quartzite pebble

Quartzite (composed primarily of Quartz, SiO2)

Unakite

Unakite (Metasomatized Granite)

Mica Schist

Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Likely chlorite-bearing schist (possibly greenschist)

Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

K-Feldspar (Potassium Feldspar)

Potassium Feldspar (KAlSi3O8)

Copper-bearing Quartz Vein in Host Rock

Quartz with Malachite/Chrysocolla staining

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Schist

Mica Schist

Gneiss

Gneiss

Orange chromium diopside (likely tumbled)

Diopside, CaMgSi₂O₆; orange color may reflect iron-rich composition or surface treatment/inclusion

Quartz

Silicon Dioxide (SiO2)

Quartz (Clear Quartz Point)

Silicon Dioxide (SiO2)

Serpentinite

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

Epidote

Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))

Greenstone / Graywacke

Metagraywacke or Chlorite Schist

Muscovite Schist

Metamorphic rock primarily composed of quartz and muscovite mica

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz-rich rock

Quartz (SiO₂), likely massive milky quartz with minor iron-stained gangue

Marble

Recrystallized Carbonate Rock (CaCO3)

Greenstone / Greywacke

Metagraywacke (contains Chlorite and Epidote)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz-rich breccia or quartzite with iron-oxide veining

Microcrystalline to granular SiO₂ (quartz), with hematite/goethite and minor feldspar or mica

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)