Yellow Quartz (Citrine/Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral
Category
Mineral Health
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Dyed Agate Geode (Pink/Magenta)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
mineral
Muscovite (White Mica)
Muscovite - Potassium aluminum silicate: KAl2(AlSi3O10)(F,OH)2
Mineral
Ferruginous Quartz (Iron-stained Quartzite)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Vesicular Basalt with Amygdaloidal Infill
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)
igneous
Jasper (var. Ocean or Polychrome Jasper)
Silicon Dioxide (SiO2) with iron and mineral inclusions
sedimentary
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Limonite
Hydrous Iron Oxide (often Goethite FeO(OH), Lepidocrocite γ-FeO(OH), and other amorphous iron oxyhydroxides)
Mineral
Rough Emerald
Emerald (Beryl), Be3Al2(SiO3)6
mineral
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Selenite (Satin Spar)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Gneiss
Gneissic Metamorphic Rock
metamorphic
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
mineral
Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Chrysocolla
Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Amygdaloidal Basalt with Epidote
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Diamond
Diamond (pure carbon, C)
mineral
Granite
Granite
Igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
mineral
Jasper with Manganese Dendrites
Silicon Dioxide (SiO2) with Oxide Mineral Inclusions
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Magnetite (in matrix)
Magnetite (Fe3O4)
mineral
Tiger's Eye
Tiger's Eye (SiO2 with crocidolite inclusions)
mineral
Basalt with Quartz Vein and Weathering Crust
Amygdaloidal or Porphyritic Basalt
igneous
Bismuth
Bismuth (Bi)
Mineral
Golden Healer Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Golden Healer Quartz
Silicon Dioxide (SiO2) with Ferruginous (Iron Oxide) inclusions
mineral
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Granite (Leucogranite)
Felsic Plutonic Rock (Granite)
igneous
Chromite
Chromite (FeCr2O4)
mineral
Quartz on Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
igneous