Metamorphic Or Sedimentary (With Staining)

Banded Iron Formation (BIF) / Tiger Iron

Ferruginous Chert (primarily Quartz [SiO2] and Hematite/Magnetite [Fe2O3/Fe3O4])

Nephrite Jade

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

Unakite

Unakite (altered granite)

Marble

Recrystallized Calcite (CaCO3)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Banded Quartzite River Pebble

Metamorphosed Quartz-rich Sandstone (SiO2)

Stichtite in Serpentine (Atlantisite)

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

Zoisite with Ruby / Anyolite

Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)

Green Aventurine (Tumbled)

Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Yellow Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Pyritic Quartzite

Metequartzite with FeS2 (Pyrite) inclusions

Serpentinite

Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Wishing Stone with Quartz Veins

Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)

Wishing Stone (Quartz-Veined Pebble)

Hydrothermal Quartz in Metasedimentary Matrix (SiO2/Matrix)

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Quartzite

Quartzite (primarily SiO2)

Shungite (Noble/Type II)

Non-crystalline carbon (Fullerene-bearing carbonaceous rock)

Agate (Moss or Dendritic Agate)

Chalcedony (Silicon Dioxide, SiO2)

Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)

Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)

Green Quartzite (or Aventurine)

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

Quartzite (Nodule)

Quartzite (SiO2)

Rhodonite in Matrix

Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Red Quartzite

Quartzite (SiO2 with iron oxide impurities)

Citrine Quartz (Yellow Quartz)

Silicon Dioxide (SiO2) with iron impurities

Quartzite

Quartzite (primarily SiO2)

Green Aventurine

Silicon Dioxide (SiO2 with Fuchsite inclusions)

Lapis Lazuli

Sodalite-rich Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Charoite

Charoite - K(Ca,Na)2Si4O10(OH,F)·H2O

Greenstone

Chlorite schist / Meta-basalt

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Unakite

Unakite (Epidotized Granite)

Greenstone (Epidosite or Altered Basalt)

Epidosite (Ca2(Al, Fe)3(SiO4)3(OH))

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock

Healer's Gold (Pyrite/Magnetite in Serpentine)

Magnetite (Fe3O4) and Pyrite (FeS2) in Lizardite/Antigorite [Mg3Si2O5(OH)4]

Anthracite Coal

Anthracite (Carbon)

Gneiss

Gneiss (a metamorphic rock)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2

Green Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Ruby Zoisite

Anyolite (Zoisite with Ruby and Pargasite)