Muscovite Mica
Muscovite, KAl2(AlSi3O10)(OH)2
mineral
Category
Mineraloid (Man Made Glass)
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Chert (Quartz)
Silicon dioxide (SiO2)
sedimentary
Green Aventurine
Quartz containing Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica (in Quartz/Feldspar Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Chert (specifically Gray Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Mica (Muscovite)
Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2
mineral
Pumice
Pumice
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica (on Quartz Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Tumbled rose quartz
Rose quartz (pink quartz), silicon dioxide, SiO₂
mineral
Libyan Desert Glass
Libyan Desert Glass (Tektite / Impact Glass)
meteorite
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Amethyst cluster
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation
mineral
Yellow-brown quartz/chalcedony fragment
Quartz, SiO₂; likely microcrystalline chalcedony with iron-oxide staining
mineral
Snowflake Obsidian
Volcanic Glass (SiO2 with Cristobalite inclusions)
igneous
Libyan Desert Glass
Libyan Desert Glass (Impactite / High-silica Lechatelierite)
mineral
Snowflake Obsidian
Volcanic glass with Spherulite inclusions (SiO2)
igneous
Rhinestone
Artificial Glass/Crystal
gemstone
Chert (Fossiliferous Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Obsidian
Obsidian (principally SiO2 - Silicon Dioxide)
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Chert (Flint)
Microcrystalline Quartz or Cryptocrystalline Silica (SiO2)
sedimentary
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
Igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous