Metamorphic Rock (Primarily Composed Of Minerals)

Honey Calcite (Yellow Calcite)

Calcium Carbonate (CaCO3)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Milky Quartz

Quartz (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Quartzite

Metamorphic Quartz (SiO2)

Wonderstone (Liesegang Sandstone)

Silicified Sandstone with Liesegang Rings (SiO2 + FeO(OH))

Quartzite

Quartzite (Primary mineral: SiO2)

Graphite

Graphite (C)

Granitoid (with Epidote and Orthoclase)

Crystalline Felsic Intrusive Rock (containing SiO2, KAlSi3O8, and Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))

Dendrite (Manganese Oxide Dendrites)

Psilomelane or Pyrolusite on Matrix (typically MnO2)

Charoite

Charoite (Hydrated silicate of potassium, sodium, calcium, barium and strontium): (K,Sr,Ba)(Na,Ca)2[Si4O10](OH,f)·H2O

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Diorite (River Pebble)

Phaneritic Intermediate Plutonic Rock (Diorite)

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Serpentine

Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)

Serpentinite

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

Mica (Biotite or Phlogopite variety)

Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)

Anthracite Coal

Anthracite (Carbon Content: 86%-97%)

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Conglomerate

Conglomerate (Detrital sedimentary rock)

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

Gneiss

High-grade regional metamorphic rock

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Milky or Greenish Quartz Pebble

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Quartzite

Quartzite (SiO2)

Granite

Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)

Pink Granite

Phaneritic Plutonic Igneous Rock (high K-feldspar content)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)