Quartz (Yellow/Citrine Variety)
Silicon Dioxide (SiO2)
mineral
Category
Tektite (Natural Glass)
Browse tektite (natural glass) specimens identified by the Rock Identifier community.
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Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
man-made glass
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Diamond (Cut Specimen)
Diamond (pure carbon, C)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Gemstone bead necklace (likely citrine or yellow quartz)
Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them
gemstone
Citrine
SiO2 (Silicon Dioxide)
mineral
Citrine (Tumbled Quartz)
Silicon Dioxide (SiO2)
mineral
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial byproduct)
mineraloid
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Citrine or Yellow Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Goldstone
Aventurine Glass (Man-made)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
Quartz (SiO2) with natural radiation
mineral
Sandstone
Arenite (SiO2 with various cementing agents)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Lemon Quartz (Orizaba/Citrinated Quartz)
Silicon Dioxide (SiO2) with iron impurities/treatment
mineral
Citrine (Heat-treated)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartz (Silicon Dioxide with Fuchsite inclusions - SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Aventurine (Green Quartz)
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Green Aventurine
Quartzite (Silicon Dioxide, SiO2 + Fuchsite)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Green Aventurine
Quartzite with Fuchsite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic