Metamorphic (Low Grade)

Serpentinite

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

Serpentine

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

Serpentine

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Blue Calcite

Calcium Carbonate (CaCO3)

Greenstone / Graywacke

Lithic Sandstone (Graywacke)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

Blue Chalcedony

Silicon Dioxide (SiO2)

Botryoidal Chalcedony (likely Desert Rose/Agatized Geode Crust)

Silicon Dioxide (SiO2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Gneiss

Gneiss (High-grade metamorphic rock)

Basalt

Basalt (primarily Plagioclase feldspar and Pyroxene)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Basalt

Basalt (Mafic volcanic rock)

Eclogite

Eclogite (Pyrope-Omphacite rock)

Ruby

Corundum (Al2O3 with Chromium impurities)

Sapphirine in Magnesian Schist

Sapphirine: (Mg,Al)8(Al,Si)6O20

Green Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Basalt (Greenstone)

Amygdaloidal Basalt / Chloritized Basalt

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Rose Quartz

Silicon Dioxide (SiO2)

Ironstone Concretion (Ironstone Gourd)

Limonite/Goethite Concretion (FeOO(H))

Chert (variously identified as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Orange Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Sandstone with Iron Oxide (Limonite/Hematite)

Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)

Nephrite Jade

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

Serpentinite

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

Ironstone concretion / Limonitic Sandstone

Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)

Ironstone Concretion (Limonite/Goethite)

Ironstone (primarily FeO(OH)·nH2O)

Ferruginous Sandstone (Grit)

Clastic Sedimentary (Ironstone-rich Sandstone)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Ferruginous Sandstone (Ironstone)

Ferruginous Sandstone / Limonite-cemented Quartz Sandstone

Blue Kyanite

Kyanite (Al2SiO5)

Lazulite

Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)

Anthracite

Anthracite Coal (C)

Fuchsite Gneiss or Schist

Muscovite (variety Fuchsite) within Metamorphic Host Rock

Serpentine

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

Pyrite

Iron Sulfide (FeS2)