Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Mineral Like (Natural Glass)
Browse mineral like (natural glass) specimens identified by the Rock Identifier community.
Learn about Mineral Like (Natural Glass) in the encyclopedia
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Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Yellow Quartz
SiO2 (Silicon Dioxide)
mineral
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)
igneous
Garnet and Quartz
Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)
mineral
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Sandstone
Arenite (SiO2 primarily)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite/Quartz Arenite
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Yellow Quartz (Citrine-colored Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass
igneous
Peach Aventurine
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst (Faceted)
Quartz (SiO2) with iron impurities
Mineral
Purple Turquoise (Composite Mojave Turquoise)
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)
mineral
Strawberry Quartz (Hematoid Quartz)
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Strawberry Quartz (or Rose Quartz / Cherry Quartz)
Silicon Dioxide (SiO2) with Lepidocrocite, Hematite, or Goethite inclusions
mineral
Smoky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide with iron impurities), SiO2
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Citrine (likely Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2 with iron impurities)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Red Jasper with Quartz
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
White Quartz Pebble
Silicon Dioxide (SiO2) - Quartz
mineral