Mineral And Metamorphic Rock

Quartz (specifically Milky/Gray Quartz)

Silicon Dioxide (SiO2)

Raw Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Milky Quartz (with Iron Oxide staining)

Quartz (Silicon Dioxide - SiO2)

Gneiss (or Granite Gneiss)

Metamorphic rock rich in quartz, feldspar, and biotite/amphibole

Epidosite (Epidote-rich rock)

Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))

Quartz Crystal (Amethyst)

Silicon Dioxide (SiO2)

Greenschist

Chlorite schist

Agate (Moss or Dendritic Agate)

Chalcedony (Silicon Dioxide, SiO2)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Ferruginous Quartz (Iron-stained Quartzite)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Agate (Geode nodule)

Cryptocrystalline Quartz (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Lapis Lazuli

Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, along with Calcite and Pyrite)

Pyrite-bearing Rock

Iron Sulfide (FeS2) associated with host rock

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Dyed Agate

SiO2 (Silicon Dioxide)

Gneiss (Banded Gneiss)

Gneiss

Lapis Lazuli

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

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Fuchsite on Quartz

Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz-rich rock with chlorite/epidote vein

Milky quartz with green chlorite or epidote; exact identification requires testing

Garnet Schist

Garnetiferous Micaceous Schist

Gneiss

Gneiss (quartz-feldspar-biotite gneiss)

Quartzite (with Quartz Veining)

Quartzite (SiO2)

Serpentine (Serpentinite)

Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Rough Green QuartzITE / Green Aventurine

Aventurine Quartz (SiO2 + Cr-muscovite inclusions)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Granitic Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz Vein in Gneiss or Basalt

Milky Quartz (SiO2) within Metamorphic Host Rock

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Gneiss

Gneiss

Marble

Metamorphic rock primarily composed of Calcite (CaCO3)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Greenstone / Greenschist

Greenschist (metamorphosed mafic rock)