Dyed Quartz Geode
Dyed crystalline quartz (Silicon Dioxide, SiO2)
mineral
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
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Onyx Agate (Brazilian Agate)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH,F)2)
metamorphic
Green Aventurine
Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Crystalline Silicon Dioxide (SiO2) with iron impurities
mineral
Yellow Quartz (Citrine appearance)
Silicon Dioxide (SiO2)
mineral
Red Dyed Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Magnetite
Magnetite (Fe3O4)
Mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)
sedimentary
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood / Chalcedony (SiO2)
mineral
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
mineraloid / anthropogenic
Granite
Granite
igneous
Jadeite (Jade)
Jadeite; NaAlSi2O6
metamorphic
Sandstone (with potentially metamorphic or basaltic bands)
Arenite / Lithic Wacke
sedimentary
Tektite (Indochinite)
Tektite (Natural Glass, SiO2 + Al2O3)
mineral
Quartz (Smoky/Druzy variety)
Silicon Dioxide (SiO2)
mineral
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Black Obsidian
Obsidian (Amorphous Silicon Dioxide)
igneous
Purple Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO2)
mineral
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Massive Quartz (Yellow/Citrine variety)
Silicon Dioxide (SiO2)
mineral