Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Category
Synthetic (Glass)
Browse synthetic (glass) specimens identified by the Rock Identifier community.
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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
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Libyan Desert Glass
Libyan Desert Glass (Impactite / High-silica Lechatelierite)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (70–75% SiO2)
igneous
Snowflake Obsidian
Spherulitic Obsidian (Volcanic Glass with Cristobalite inclusions)
igneous
Obsidian with Mahogany Phasing
Volcanic Glass (SiO2 + Fe2O3)
igneous
Black Obsidian
Volcanic glass
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
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Obsidian
Volcanic glass
igneous
Snowflake Obsidian
Volcanic Glass (SiO2) with Cristobalite inclusions
igneous
Rhinestone
Artificial Glass/Crystal
gemstone
Snowflake Obsidian
Volcanic glass with Spherulite inclusions (SiO2)
igneous
Chert (Fossiliferous Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Amorphous Solid
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (mostly SiO2)
igneous
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
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic glass
igneous
Sea Glass
Amorphous Silica (SiO2) with various additives
Mineraloid (Anthropogenic)
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
Igneous
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions (SiO2)
igneous
Amethyst (Raw Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
White tumbled stone, likely quartz or calcite
Indeterminate; possibly quartz (SiO₂) or calcite (CaCO₃)
mineral