Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions
mineral
Category
Mineral And Glass
Browse mineral and glass specimens identified by the Rock Identifier community.
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2, or Silicon Dioxide)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Amethyst (Chevron or Banded)
Silicon Dioxide with impurities (SiO2)
mineral
Amethyst (Druzy Cluster)
Amethyst (Silicon Dioxide with Iron impurities), SiO2
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz River Cobble
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
mineral
Plagioclase Feldspar
NaAlSi3O8 – CaAlSi2O8 (Sodium-Calcium Aluminum Silicates)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Pink Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz (Druzy Geode fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Rhyolitic Matrix
igneous
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Garnet (Almandine/Pyrope)
Silicate Mineral (Group: X3Y2(SiO4)3 where X=Mg, Fe, Mn and Y=Al, Fe, Cr)
mineral
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
igneous and sedimentary mixture
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)
sedimentary
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Pebble (Citrine-colored or Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Topaz (Imperial or Precious Topaz)
Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)
mineral
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Jasper with Quartz inclusion
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral