Mineral (Native Element Alloy)

Pyrite in Quartz

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Limonite (Iron Ore)

Hydrated ferric oxide (FeO(OH)·nH2O)

Granite with Hematite staining

Granitoid (Quartz, Feldspar, Mica) with Iron Oxide (Fe2O3)

Covellite

Covellite (CuS)

Schist (Micaceous)

Mica Schist

Chrysocolla on Quartz with Iron Oxides

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)

Ferruginous Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Goethite)

Tree Agate

Silicon dioxide (SiO2)

Aura Quartz Bead

Silicon dioxide (SiO2) with metal coating

Basalt with Xenolith

Extrusive Igneous Rock containing Mantle Xenolith

Gneiss with Quartz Vein

Metamorphic Gneiss

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Feldspar (likely Orthoclase or Plagioclase)

Tectosilicate Feldspar (KAlSi3O8 to (Ca,Na)(Al,Si)4O8)

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Fluorite (likely Fluorite on Quartz/Matrix)

Calcium Fluoride (CaF2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi₃O₈)

Bumblebee Jasper

Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Pearl

Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Azurite and Malachite

Cu3(CO3)2(OH)2 (Azurite) and Cu2(CO3)(OH)2 (Malachite)

Malachite

Copper(II) carbonate hydroxide [Cu2CO3(OH)2]

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Mineral

Quartz (Silicon Dioxide, SiO2)

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Gneiss

Gneiss

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Gneiss

Gneiss

Granite

Granite (Felsic Plutonic Rock)

Coarse-grained Granite

Granitoid (KAlSi3O8 + SiO2 + NaAlSi3O8)

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Weathered granite-like rock

Granite, likely biotite-bearing; exact identification is uncertain from the image

Chakra Stone Tower (Composite Multi-Mineral)

Crystalline Silicon Dioxide composite (SiO2) with various inclusions

Amethyst, Aventurine, and Quartz Mix

Silicon Dioxide (SiO2) with various inclusions/trace elements

Gneiss

Banded Gneiss

Gneiss

Metamorphic Gneiss

Gneiss (with Quartzite and Mica)

Gneiss

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Diorite

Phaneritic plutonic rock (dominated by plagioclase feldspar and hornblende)