Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Category
Mineral Health
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Quartz (Riverstone / Cobble)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Fluorite
Fluoride (Calcium Fluoride - CaF2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Greenschist (Greenstone)
Chlorite Schist / Greenschist Facies Rock
metamorphic
Dendrite (Manganese Oxide Dendrites)
Psilomelane or Pyrolusite on Matrix (typically MnO2)
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Blue Celestite (with Galena)
Strontium sulfate (SrSO4) and Lead sulfide (PbS)
mineral
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Quartzite with Quartz Vein
Quartzite (SiO2)
metamorphic
Pyrite
Iron Pyrite (FeS2)
mineral
Kyawthuite
Kyawthuite (Bi3+Sb5+O4)
mineral
Sandstone (Red Sandstone)
Arenite
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Clear/White Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Banded Agate (Lake Superior Agate style)
Silicon Dioxide (SiO2)
mineral
Rainbow Moonstone
White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8
gemstone
Amethyst Cluster
Silicon Dioxide (SiO2) with iron impurities
mineral
Rainbow Moonstone (White Labradorite)
White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
sedimentary
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Mineral
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Amethyst (Ametrine or Bicolor Quartz variant)
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Amethyst in Matrix
Silicon Dioxide with Iron Impurities (SiO2)
mineral
Hypersthene
Hypersthene ((Mg,Fe)SiO3)
mineral
Epidosite (Unakite-related)
Epidosite (composed primarily of Epidote and Quartz)
metamorphic
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral