Metamorphic Or Igneous Alteration

Ruby (Raw/Rough)

Corundum (Al2O3 with Chromium trace)

Glauconite (Greensand)

(K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂

Glauconitic Sandstone

Glauconitic Quartz Arenite

Botryoidal Hematite (Kidney Ore)

Hematite (Fe2O3)

Glauconitic Sandstone

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

Glauconite (Sandstone or Shale)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Almandine Garnet

Almandite (Fe3Al2(SiO4)3)

Chert (Arrowhead/Tool variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Glauconite (Green Sandstone)

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Glauconitic Sandstone (Greensand)

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Pyrite

Iron Sulfide (FeS2)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Blue Crackle Quartz (Dyed Fire Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye treatment

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Chrome Diopside

Diopside (Magnesium Calcium Silicate) - CaMgSi2O6 + Cr

Glauconite (Greensand)

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

Chert (and Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Bituminous Coal

Organic sedimentary rock (humic coal)

Glauconitic Sandstone (Greensand)

Glauconitic quartz wacke or arenite

Glauconitic Sandstone (Greenstone)

Glauconitic Siliciclastic Sandstone (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Rhodochrosite

Manganese Carbonate (MnCO3)

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (containing Glauconite, (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Chrysocolla

Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·n(H2O)

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Stichtite (often found in Serpentinite)

Stichtite Mg6Cr2CO3(OH)16·4H2O

Jasper

Jasper (Silicon Dioxide, SiO2)

Glauconite

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Jasper (Green Jasper / Bloodstone variant base)

Silicon Dioxide (SiO2) with impurities of chlorite and iron oxides

Yellow Calcite

Calcium Carbonate (CaCO3)

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)

Ruby

Corundum (Al2O3 with Chromium traces)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)

Chrysocolla

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Glauconitic Sandstone (Greensand)

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

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, with varying amounts of Calcite, Pyrite, and Sodalite).

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)