Quartz (Smoky/Milky variant)
Silicon Dioxide (SiO2)
mineral
Category
Mineral Like (Natural Glass)
Browse mineral like (natural glass) specimens identified by the Rock Identifier community.
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Rough Quartz (Grey-Green)
Silicon Dioxide (SiO2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Chert / Chalcedony
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble (with Mica or Iron staining)
Silicon Dioxide (SiO2)
mineral
Boulder Opal
Hydrated amorphous silica (SiO2·nH2O) in ironstone matrix
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Sandstone
Arenite
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with iron oxide cement, Fe2O3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Milky Quartz with Chlorite/Moss Infusions
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline silica (SiO2)
sedimentary
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
mineral
Milky Quartz Pebble with Inclusions
Crystalline Silicon Dioxide (SiO2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (Chert Pebble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral