Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
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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Fluorite (specifically Blue John or Banded Fluorite)
Calcium Fluoride (CaF2)
mineral
Blue cabochon gemstone ring
Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel
gemstone
Tumbled yellow-orange chalcedony (likely carnelian or jasper)
Microcrystalline quartz, SiO₂; iron-oxide coloration
mineral
Sandstone
Arenite (variable SiO2 composition)
sedimentary
Tumbled blue-green stone, possibly dyed turquoise or chrysocolla
Uncertain; turquoise is hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Tumbled tiger’s-eye
Tiger’s-eye quartz, microcrystalline SiO₂ with fibrous crocidolite pseudomorphs
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Silicon Dioxide (SiO2) - Quartz
mineral
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
mineral
Unidentified purple mineral fragment
Possibly amethyst (quartz), but the image is insufficient for confident identification
mineral
Tumbled amethyst
Quartz, SiO₂; purple variety colored mainly by iron-related defects
gemstone
Smoky Quartz with possible inclusion
Silicon Dioxide (SiO2)
mineral
Chert (Siliceous Pebble)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Banded Agate (Dyed Purple)
Agate (Variety of Chalcedony/Quartz), SiO2
mineral
Quartz Crystal (Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material)
Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Polished green aventurine (probable)
Quartzite dominated by quartz (SiO₂), with green mica/fuchsite inclusions
mineral
Smoky Quartz occurring with Feldspar
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Tektite (Indochinite)
Tektite (Natural silica glass)
igneous
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Yellow Quartz or Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Opalite
Man-made opalized glass
mineral
Obsidian (black volcanic glass)
Obsidian; silica-rich volcanic glass, typically rhyolitic to dacitic composition
igneous
Sandstone
Arenite
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary