Metamorphic Or Sedimentary (With Staining)

Diorite Gneiss

Foliated Diorite Gneiss

Mica Schist

Muscovite/Biotite Schist

Anthracite Coal

Anthracite (Carbon-based metamorphic rock)

Serpentine (variety: Serpentine Rock)

Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Zebra Jasper

Silicon Dioxide (SiO2) with iron oxide and manganese inclusions

Mica Schist

Mica Schist (primarily Muscovite and Biotite micas)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Blue Quartz (specifically Dumortierite Quartz)

SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)

Greenstone

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

Lepidolite in Quartz (Obelisk)

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite)

Quartzite with Mica schist fragment

Quartzite (SiO2) with Muscovite/Biotite Schist

Quartzite with Garnet

Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)

Black Tourmaline (Schorl)

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH

Serpentine

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

Serpentine (Serpentinite)

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Black Sapphire

Corundum (Al2O3 with iron and titanium impurities)

Green Aventurine

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

Quartzite Pebble

Meta-quartzite

Quartzite

Quartzite (SiO2)

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Stichtite in Serpentine (Atlantisite)

Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)

Epidotite (Unakite variety)

Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Tree Agate (Dendritic Agate)

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite

Quartzite (SiO2)

Lapis Lazuli

Lapis Lazuli (Complex silicate mixture)

Green Quartzite

Quartzite (primarily SiO2 with chlorite inclusions)

Unakite

Unakite (altered granitic rock)

Smoky Quartz

Silicon Dioxide (SiO2)

Sodalite

Na8(Al6Si6O24)Cl2 (Sodalite)

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble (Water-worn Quartzite)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Marble

Recrystallized Calcite (CaCO3)

Greenschist

Greenschist (Chlorite-actinolite schist)

Unakite

Epidotized Granite (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

Yellow Aventurine

Quartzite with inclusions (SiO2)

Sunstone with Black Tourmaline (Arfvedsonite)

Feldspar (Na,Ca)(Al,Si)4O8 with Schorl Na(Fe3+)3Al6(Si6O18)(BO3)3(OH)3(OH)

Zoisite with Ruby (Anyolite)

Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)

Quartzite (Pebble)

Quartzite