Sedimentary Or Metamorphic

Serpentine

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

Marble

Metamorphosed Limestone (principally CaCO3)

Quartzite

Quartzite (mainly SiO2)

Eclogite

Eclogite (composed primarily of Omphacite and Pyrope Garnet)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (mostly SiO2)

Yellow Quartzite (Yellow Jasper)

Silicon Dioxide (SiO2)

Red Quartzite

Quartzite (SiO2)

Unakite

Epidotized Granite

Quartzite Pebble

Quartzite (SiO2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2), a variety of Actinolite-Tremolite

Quartz (Quartzite Pebble)

Silicon Dioxide (SiO2)

Greenstone Celt (Polished Stone Axe)

Metamorphosed mafic rock (often Basalt or Diabase)

Pink Quartzite

Quartzite (primarily SiO2)

Quartz (Quartzite)

Silicon Dioxide (SiO2)

Lapis Lazuli

Complex metamorphic rock consisting mainly of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite

Quartzite (Iron-stained)

Quartzite (SiO2 with Fe-oxides)

Quartzite Pebble

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Tiffany Stone

Fluoritized Opal Beryllium Tuff (composed of Fluorite; CaF2, Opalized SiO2, Bertrandite, Chalcedony, and Quartz)

Red Tiger Eye (or Polished Jasper Gneiss)

Silicon dioxide with crocidolite inclusions (SiO2)

Inspirational River Stone (Quartzite)

Metamorphosed Quartz-rich Rock (Quartzite) with SiO2 composition

Green Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartzite

Quartzite (SiO2)

Red Quartzite (Ferruginous Quartz)

Quartzite (SiO2 with Fe2O3 inclusions)

Quartzite

Quartzite (SiO2)

Quartzite with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 impurities

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Quartzite River Rock

Quartzite (Silicon Dioxide, SiO2)

Shungite

Non-crystalline carbon (Fullerenes)

Green Aventurine

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

Quartzite with Hematite

Silica (SiO2) with Ferric Oxide (Fe2O3) inclusions

Nephrite Jade

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Quartzite Cobble

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Muscovite Schist

Mica Schist (KAl2(AlSi3O10)(OH)2)

Quartzite

Quartzite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)