Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Category
Glass
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Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Quartzite
Quartzite (mostly SiO2)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Chert (Chert Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Common Opal/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian
Obsidian (volcanic glass), predominantly Silicon Dioxide (SiO2)
igneous
Pumice
Pumice (SiO2 + Al2O3 + Fe2O3)
igneous
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Quartzite
Quartzite (principally SiO2)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartz and Quartzite
Silicon Dioxide (SiO2)
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Rose Quartz (Dyed)
Silicon Dioxide (SiO2) with trace impurities
mineral
Moldavite
Moldavite (Siliceous vitreous substance)
tektite (natural glass)
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (primarily SiO2)
igneous
Obsidian
Obsidian (Volcanic Glass, ~70–75% SiO2)
igneous
Obsidian / Volcanic Glass
Obsidian (principally SiO2, usually 70% or more)
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Rough)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral