Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Metamorphic Or Sedimentary
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Quartzite
Quartzite (SiO2)
metamorphic
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Slate
Foliated Metamorphic Rock (composed mainly of Quartz, Illite, and Chlorite)
metamorphic
Anthracite Coal
Anthracite (Carbon-based metamorphic rock, 86-97% C)
metamorphic
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
metamorphic
Greenschist
Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)
metamorphic
Quartz (Druzy) on Matrix
Silicon Dioxide (SiO2)
mineral
Red Garnet (Pyrope or Almandine)
Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz (with trace inclusions)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
igneous
Milky Quartz with Chlorite/Moss Infusions
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Corundum (variety Ruby/Sapphire)
Aluminum Oxide (Al2O3)
mineral
Jasper (with orbicular/unakitoid tendencies)
Silicon Dioxide (SiO2) with iron and epidote inclusions
sedimentary (chemically precipitated) or metamorphic
Greenschist
Greenschist (Chlorite Schist facies)
metamorphic
Green Quartzite (Aventurine-like)
Quartzite (primarily SiO2 with trace Fuchsite mica inclusions)
metamorphic
Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Soapstone
Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)
metamorphic
Faceted Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Orthoclase Feldspar
K(AlSi3O8)
mineral
Black Tourmaline (Schorl)
Schorl (Sodium iron aluminum borosilicate hydroxide) NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2)
metamorphic
Morganite and Aquamarine (Beryl) Bracelet
Beryllium aluminum silicate, Be3Al2(SiO3)6
gemstone
Yellow Aventurine
Silicon Dioxide with inclusions (SiO2)
mineral
Rough Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Tumbled Agate and Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sapphire
Corundum (Al2O3)
mineral
Magnetite with Serpentine
Magnetite (Fe3O4) in Serpentine Matrix
mineral
Greenstone / Serpentinite
Antigorite/Lizardite series (Mg,Fe)3Si2O5(OH)4
metamorphic
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate
mineral
Blue Quartz
Quartz (Silicon Dioxide) with blue inclusions (SiO2)
mineral
Jade (Nephrite and Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2; Jadeite: NaAlSi2O6
metamorphic