Sedimentary Or Metamorphic (Low Grade)

Gneiss (River Cobble)

Gneiss (Foliated Metamorphic Rock)

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Jasper (Red Jasper)

Silicon Dioxide (SiO2) with Hematite inclusions

Anthracite Coal

Anthracite

Quartz (Milky or Citrine-tinted)

Silicon Dioxide (SiO2)

Schist with Biotite Inclusion

Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Blue Apatite

Apatite, Ca5(PO4)3(F,Cl,OH)

Venetian Gold Granite

Phaneritic Felsic Igneous Rock (Granite)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Foliated Gneiss (River-Worn Pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Gneiss (with Quartz and Mica)

Gneiss

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Citrine (Heat-treated Amethyst)

Citrine Quartz (SiO2)

Sunstone

Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)

Limonite/Goethite Nodule

Iron Oxyhydroxide (primarily FeO(OH)·nH2O)

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Greenstone (Amygdaloidal Basalt)

Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Alexandrite in Matrix

Chrysoberyl (BeAl2O4 with Chromium impurities)

Quartz

Silicon Dioxide (SiO₂)

Petrified Wood

Silicified wood (primarily Quartz/Chalcedony, SiO2)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite inclusions

Red Jasper

SiO2 (Silicon Dioxide with Iron inclusions)

Quartzite

Quartzite (primarily SiO2)

Quartz (Common Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)