Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Man Made Glass Mineral Simulant
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
Learn about Man Made Glass Mineral Simulant in the encyclopedia
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Possible tektite or dark volcanic rock fragment
Uncertain; likely natural silicate glass (tektite) or basalt
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 with K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Snowflake Obsidian
Obsidian with Cristobalite inclusions (Amorphous SiO2 + SiO2 inclusions)
igneous
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Zirconia (Ceramic) & Ion-X Glass
Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass
Synthetic Mineral / Glass
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartzite Pebble
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz (Small Grains)
Silicon Dioxide (SiO2)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Moss-covered)
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green polished gemstone (likely chrysoprase or aventurine)
Chrysoprase: microcrystalline quartz, SiO₂, colored by nickel; possible aventurine quartz: SiO₂ with fuchsite mica
gemstone
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Chip
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
igneous
Black Obsidian
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (primarily SiO2)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Obsidian
Volcanic glass (SiO2 - Silicon dioxide predominant composition)
Igneous
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Black-and-white gneiss
Gneiss, chiefly quartz–feldspar with dark biotite/amphibole bands
metamorphic
Mica (specimen appears to be Muscovite or Phlogopite)
Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2
Mineral (Found in Igneous and Metamorphic rocks)
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Granitic Pegmatite with Muscovite Mica
Pegmatite (containing KAl2(AlSi3O10)(OH)2)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Rough Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Polished green aventurine
Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂
mineral
Quartz Vein Rock with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Weathered sandstone or tuff fragment
Likely quartz-rich sandstone (SiO₂) or porous volcanic tuff; exact identification requires testing
sedimentary
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide - SiO2)
mineral