Limonite / Ironstone
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Category
Industrial Byproduct (Anthropogenic Material)
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Serpentinite
Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4
metamorphic
Citrine (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Variety: Citrine or Tumbled Chalcedony)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Schist
Mica Schist
metamorphic
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO₂)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Beach Pebble)
Silicon Dioxide (SiO2)
mineral
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Igneous Rock
igneous
Chalcedony (Botryoidal/Drusy Quartz)
Silicon Dioxide (SiO₂)
Mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Diamond
Native Carbon (C)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Granitic Pegmatite with Biotite
Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)
igneous
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Diamond (Princess Cut Faceted Gemstone)
Native Carbon (C)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Silver (Native Silver)
Native Silver (Ag)
mineral
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Granite Pegmatite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Schist
Mica Schist
metamorphic
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Ruby
Corundum (Al2O3)
mineral
Quartz Vein in Host Rock
Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)
metamorphic
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Basalt with minor mineral crusting
Sideromelane / Extrusive Igneous Rock
igneous
Sodalite
Sodalite - Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Quartz with Mica (Micaceous Quartz)
Silicon Dioxide (SiO2) with Phyllosilicates
igneous/metamorphic
Black Tourmaline (Schorl)
Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
metamorphic