Metamorphic Or Mineral

Milky Quartz

Silicon Dioxide (SiO2)

Ruby (Pinkish-Red)

Corundum (Al2O3 with Chromium trace)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Agate (Lace Agate)

Agate (Variety of Cryptocrystalline Quartz), SiO2

Yellow Quartz (Citrine/Gold Quartz)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Schist

Mica Schist (variety: Muscovite/Biotite Schist)

Labradorite (Feldspar)

Labradorite: (Ca,Na)(Al,Si)4O8

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Quartz with Mica (Schist/Pegmatite fragment)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

Green Aventurine

Quartz (Silicon Dioxide) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Tiger's Eye (Golden)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Green Quartzite (with possible Epidote/Chlorite inclusions)

Quartzite (primarily SiO2)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite mica; Chemical formula: SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Wishing Stone with Quartz Vein

Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)

Unakite

Epidotized Granite

Almandine Garnet

Almandine - Fe3Al2(SiO4)3

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Schist (Garnet-Mica Schist)

Garnetiferous Mica Schist (primarily Muscovite/Biotite and Almandine Garnet)

Quartz Pebble

Silicon Dioxide (SiO2)

Aventurine (likely Green Aventurine)

Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)

Calcite

Calcium Carbonate (CaCO3)

Yellow Aventurine

Quartzite with inclusions (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Granite Gneiss

Felsic Gneiss

Garnet Schist

Garnetiferous Mica Schist

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Blue Spinel on Marble with Phlogopite

MgAl2O4 (Spinel) in CaCO3 (Calcite/Marble) matrix

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Moonstone

Orthoclase Feldspar (KAlSi3O8) or Albite mixtures

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Bull Quartz (White Quartz)

Silicon Dioxide (SiO2)

Gneiss Pebble

Gneiss