Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Category
Industrial Byproduct (Anthropogenic Material)
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Magnetite
Magnetite (Fe3O4)
mineral
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Sandstone Cobble with Iron Staining
Arenite with Limonite/Hematite staining
sedimentary
Pegmatite (with Muscovite Mica and Quartz)
Granitic Pegmatite (chiefly KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)
igneous
Pink Sapphire (Corundum)
Aluminum Oxide (Al2O3) with Chromium/Iron impurities
gemstone
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Porphyritic Basalt
Basalt (Extrusive Igneous Rock)
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Orange Sapphire
Corundum (Al2O3 with trace elements)
gemstone
Raw Garnet (Hessonite / Spessartine)
Silicate mineral group (X3Y2(SiO4)3)
gemstone
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Coal
Anthracite or Bituminous Coal (Carbon)
sedimentary
Diamond (Princess Cut)
Carbon (C)
gemstone
Chert (Black Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Red Claystone / Mudstone
Argillaceous sedimentary rock
sedimentary
Diamond (Faceted)
Diamond (Pure Carbon, C)
gemstone
White Topaz (faceted)
Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)
gemstone
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
gemstone
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl) on Quartz
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Diamond (or Clear Zircon/Sapphire)
Carbon (C)
gemstone
Diamond
Carbon (C)
gemstone
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
sedimentary
Yellow Sapphire (Raw)
Corundum (Al2O3)
mineral
Diamond (Baguette cut)
Carbon (C)
gemstone
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Garnet
Garnet group (X3Y2(SiO4)3)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Pegmatite (Granitic)
Granite Pegmatite
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Garnet (Pyrope or Almandine)
Garnet Group (A3B2(SiO4)3)
mineral
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
Diamond (in jewelry setting)
Diamond (C - Pure Carbon)
mineral