Mineral And Metamorphic Rock

Quartz

Silicon Dioxide (SiO2)

Banded Pebble (Metamorphic Slate or Gneiss with Quartz Veining)

Metamorphic Rock with Quartz/Calcite Veins

Milky Quartz with Garnet/Hematite and Basalt

Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt

Quartz Crystal

Silicon Dioxide (SiO2)

Mica Schist

Mica Schist (contains muscovite/biotite, quartz, plagioclase)

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Slate

Foliated Metamorphic Rock (Slate)

Gneiss

High-grade regional metamorphic rock

Weathered amphibolite or mafic metamorphic rock

Amphibolite; chiefly hornblende amphibole and plagioclase feldspar

Quartzite with Calcite Accretion

Metamorphosed Quartz Sandstone (SiO2 with CaCO3 coating)

Granite / Gneiss (Felsic Metamorphic or Igneous Rock)

Gneiss (or weathered Granite)

Gneiss

High-grade foliated metamorphic rock

Mica Schist

Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)

Slate

Slate (Foliated Metamorphic Rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Greenstone with Magnetite Veins

Metabasalt (Greenstone)

Gneiss Pebble

Gneiss (High-grade metamorphic rock)

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Muscovite Schist

Muscovite Schist (KAl2(AlSi3O10)(OH)2 matrix)

Lapis Lazuli (Raw Ore)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Schist

Chlorite or Mica Schist

Quartz Pebble (Water-worn Quartzite)

Silicon Dioxide (SiO2)

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining

Clear Quartz

Silicon dioxide (SiO2)

Gneiss

Gneiss (Foliated Metamorphic Rock)

Quartz-bearing metamorphic rock, likely garnet-mica schist

Quartz–mica schist with probable garnet and iron-oxide minerals

Mica Schist

Mica Schist (primarily muscovite and biotite)

Nuummite

Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)

Giallo Ornamental Granite

Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Gold-bearing Quartz

Auriferous Quartz (SiO2 with Native Gold inclusion)

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Schist

Mica Schist

Chrysocolla (on host rock)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)