Mineral, Often Found As A Rock (Metamorphic)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Druzy Quartz on Chalcedony Matrix

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(F,OH)2

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Unakite

Epidotized Granite

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebbles

Quartzite (SiO2 silicon dioxide dominant)

Schist (Kyanite Schist)

Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Red Quartzite River Pebble

Quartzite (SiO2 with iron oxide inclusions)

Ruby in Zoisite (Anyolite)

Anyolite (Combination of Corundum and Zoisite)

Quartzite

Quartzite (SiO2)

Dumortierite Quartz

Al7BO3(SiO4)3O3 (Aluminum borate silicate)

Yellow Quartzite (River Stone)

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Kunzite

Spodumene (LiAlSi2O6), variety Kunzite

Basalt with Granite Inclusions (Xenoliths)

Mafic igneous rock (Basalt) with Sialic minerals

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Quartzite Pebble

Quartzite (SiO2)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Riverstone Quartzite

Quartzite (primarily SiO2)

Banded Gneiss

Gneiss

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Quartzite (Iron-stained)

Metamorphosed Quartz-rich Rock (SiO2)

River Quartzite or Chert Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Slate

Slate (foliated metamorphic rock)

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (SiO2)

Lapis Lazuli (Low Grade)

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

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Sandstone (with potentially high Feldspar/Arkose content)

Clastic sedimentary rock (SiO2 dominated)

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (mainly SiO2)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)