Amethyst (Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Igneous Or Sedimentary
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Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2)
mineral
Smoky Quartz (Polished)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Bull Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Labradorite (Gray Feldspar)
(Ca, Na)(Al, Si)4O8
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet Group (Silicate Minerals)
mineral
Carnelian
Silicon dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of Ti, Mn, or Fe
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Carnelian
Carnelian (Silicate mineral, SiO2)
mineral
Garnet
Garnet Group (e.g., Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Pyrite in Quartz
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Mineral
Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Sunstone
Oligoclase (Plagioclase Feldspar), (Na,Ca)(Si,Al)4O8
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Epidote in Quartz (Epidosite)
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Amethyst (Variety of Quartz)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Citrine
Crystalline Quartz (SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Point
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Sodalite (in Matrix)
Sodalite Na8(Al6Si6O24)Cl2
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral