Metamorphic Rock (Primarily Composed Of Minerals)

Geode (Unopened)

Silicon Dioxide (SiO2) in sedimentary vugs

Orange Quartzite / Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

Amethyst and Ruby in Zoisite

Silicon Dioxide (SiO2) and Anyolite (Zoisite-Hornblende-Ruby mix)

Diorite

Diorite (Intermediate intrusive igneous rock)

Gemstone Sand (Mineral Assortment)

Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)

Tiger's Eye (Inlaid in a band)

SiO2 (Silicon Dioxide with Crocidolite inclusions)

Rhodonite with Manganese Oxides

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Serpentine

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

Mica Schist

Mica Schist (Predominantly Muscovite/Biotite)

Quartzite River Rock (with Limonite staining)

Quartzite (SiO2)

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Tiger's Eye (specifically Blue/Golden mixed or Hawk's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase)

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

Garnet-Mica Schist

Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Bauxite Ore

Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)

Greenschist / Greenstone

Greenschist facies metabasite

Green Aventurine

Aventurine Quartz (SiO2 with inclusions)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Ruby Fuchsite / Ruby in Fuchsite

Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix

Greenschist

Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Chrysocolla and Azurite in Matrix

Hydrated copper phyllosilicate (Chrysocolla - Cu2H2Si2O5(OH)4) and Copper carbonate (Azurite - Cu3(CO3)2(OH)2)

Granite

Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)

Gossan (Iron Hat)

Limonitic Gossan (Fe-oxide/hydroxide complex)

Green Calcite

Calcium Carbonate (CaCO3)

Granite

Granite

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Quartzite

Quartzite (SiO2)

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Turquoise in Matrix

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

Gneiss (Granitic Gneiss)

Gneiss

Coquina / Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate - CaCO3)

Sandstone (Pebble/Conglomerate fragment)

Sandstone (clastic sedimentary rock)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)