Metamorphic Rock

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Venetian Gold Granite

Phaneritic Felsic Igneous Rock (Granite)

Gneiss (River Cobble)

Metamorphic Gneiss

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

Serpentine

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

Spessartine Garnet in Quartz/Feldspar Pegmatite

Spessartine (Mn3Al2(SiO4)3) in Quartz (SiO2) and Feldspar

Schist (Oxidized)

Mica Schist with Iron Oxide staining

Yellow Quartzite (River Pebble)

Quartzite (SiO2)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Quartzite Pebble

Quartzite (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Garnet Gneiss

Garnetiferous Gneiss

Schist

Mica Schist

Garnet-Bearing Schist

Almandine Garnet Schist

Quartzite Pebble

Quartzite (mostly SiO2)

Eclogite

Eclogite (Pyrope garnet and Omphacite pyroxene)

Almandine Garnet in Schist

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Greenschist

Greenschist (chlorite-epidote schist)

Quartz Vein in Host Rock

Hydrothermal Quartz (SiO2) in Slates/Schists

Unakite (or Epidote-rich Granite)

Unakite (Metamorphosed Granite consisting of Epidote, Orthoclase, and Quartz)

Serpentine

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

Agate

Silicon dioxide (SiO2) - Microcrystalline Quartz

Grey Agate (Tumbled)

Silicon Dioxide (SiO2)

Fuchsite Quartzite (Green Aventurine in raw form)

Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Quartz with Mica/Host Rock

Silicon Dioxide (SiO2) with Phyllosilicates

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Serpentinite (often called Jade or Nephrite substitute)

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Banded Agate (Gray/Brown)

Silicon Dioxide (SiO2)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Eclogite

Eclogite (Omphacite + Pyrope)

River Stone (possibly Gneiss)

Metamorphic Gneiss

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Amphibolite

Amphibolite (rich in amphibole and plagioclase feldspar)

Sandstone (Micaceous)

Clastic Sedimentary Rock (primarily SiO2 with Mica)

Slickenside

Tectonic Fault Scarp Surface

Unakite

Epidotized Granite

Quartzite River Rock

Quartzite (primarily SiO2)

Travertine

Terrestrial Sedimentary Limestone (CaCO3)