Milky Quartz with Iron Oxide
Quartz (Silicon Dioxide, SiO2) with Limonite/Goethite staining
mineral
Category
Mineral Like (Natural Glass)
Browse mineral like (natural glass) specimens identified by the Rock Identifier community.
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
mineral
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
mineral
Diamond
Native Carbon (C)
mineral
Dyed Pink Agate (Crackled)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Yellow Chert (Chert / Cryptocrystalline Quartz)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Cryptocrystalline quartz (SiO2)
Sedimentary/Mineral
Oolitic Chert
Silicon Dioxide (SiO2) with Oolitic texture
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Obsidian
Obsidian (Volcanic Glass)
igneous
Pink Granite
Felsic intrusive igneous rock (composition: SiO2 and Al2O3)
igneous
Quartz (Smoky/Milky variant)
Silicon Dioxide (SiO2)
mineral
White Sapphire
Corundum (Al2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
mineraloid
Granodiorite
Granodiorite
Igneous
Rough Quartz (likely Rose or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Jasper
Chalcedony (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Yellowish)
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Amethyst
Amethyst (Purple Quartz); formula: SiO2 (Silicon Dioxide)
mineral
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion, SiO2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Black Opal
Amorphous hydrated silica (SiO2 nH2O)
mineral
Amethyst (Faceted)
Amethyst (Silicon Dioxide with iron impurities, SiO2)
mineral
Black Pearl (Tahitian Pearl)
Aragonite / Calcite (CaCO3) with Conchiolin
mineral