Tektite (Indochinite)
Tektite (Natural silica glass)
igneous
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
View all →
Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Diamond
Carbon (C)
gemstone
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Aquamarine (Tumbled)
Beryl (Be3Al2Si6O18)
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Amethyst
Amethyst (Silicon Dioxide with iron impurities, SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Crystalline Quartz
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Orange Quartz (Citrine Quartz variety)
Silicon Dioxide (SiO2)
mineral
Banded Chert / Cryptocrystalline Quartz
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2) with iron impurities
mineral
Blue Chalcedony (likely dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Sandstone
Arenite
sedimentary
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Smoky Quartz and Clear Quartz Geode
Silicon Dioxide (SiO2)
mineral
Green Aventurine (Gua Sha tool)
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral
Goldstone
Avventurina (Man-made Glass with Copper inclusions)
mineral
Black Freshwater Pearls
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz - SiO2)
sedimentary
Aventurine (Green)
Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Silicon
Silicon (Si)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Dyed Agate Geode Slice
Silicon Dioxide (SiO2) with artificial pigment
mineral
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
Igneous
Asphalt (Bituminous Rock)
Natural bitumen or Bituminous limestone/sandstone
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2)
mineral
Strawberry Quartz (Hematoid Quartz)
Silicon Dioxide with Hematite/Goethite inclusions (SiO2 + Fe2O3)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral