Igneous, Metamorphic, Sedimentary

Ruby (Raw Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Citrine

Silicon Dioxide (SiO2) with iron impurities

Feldspar (Orthoclase/Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

White Moonstone (Feldspar)

Potassium aluminum silicate (KAlSi3O8)

Golden Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Gossan (Iron Hat)

Limonitic Gossan (Fe-oxide/hydroxide complex)

Greenschist

Greenschist (Chlorite Schist)

Greenschist (Greenstone)

Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)

Gold-bearing Quartz Ore

Auriferous Quartz (SiO2 + Au)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Serpentine

Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Greenstone with Quartz Veining

Metamorphosed Mafic Igneous Rock

Greenstone (Diabase or Metabasalt)

Metamorphosed Mafic Igneous Rock

Quartz Cluster (Likely Ferruginous)

Silicon Dioxide (SiO2)

Greenstone / Greenschist

Greenschist (contains chlorite, epidote, actinolite)

Greenstone

Metabasalt (composed of chlorite, epidote, and actinolite)

Eclogite

Eclogite (Omphacite-Garnet Rock)

Greenstone

Metabasalt or Greenschist (often contains Chlorite, Actinolite, and Epidote)

Nuummite

Nuummite (intergrowth of orthoamphiboles Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)

Epidote in Matrix

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Unakite or Epidosite

Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)

Blue Kyanite

Kyanite (Al2SiO5)

Kyanite (Blue Kyanite)

Kyanite (Al2SiO5)

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Specular Hematite (on Schist/Matrix)

Hematite (Alpha-Fe2O3)

Garnet in Matrix

Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)

Mica Schist

Schist (biotite/muscovite schist)

Sapphire (Corundum variety)

Sapphire (Al₂O₃)

Bull Quartz with Mica and Host Rock

Massive Quartz (SiO2) with Muscovite/Chlorite inclusions

Zircon

Zircon (ZrSiO4)

Greenstone

Metamorphic mafic rock (chlorite-actinolite-epidote schist)

Greenstone

Metabasalt / Metavolcanic rock

Greenstone / Greenschist

Metamorphosed mafic igneous rock (Greenschist facies)

Greenstone (Epidosite/Altered Diorite)

Metabasalt or Meta-andesite / Epidotized Diorite

Greenstone / Metabasalt

Chlorite schist or Epidiorite

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)