Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Category
Mineral (Man Enhanced)
Browse mineral (man enhanced) specimens identified by the Rock Identifier community.
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Red Sandstone
Arenite (primarily Quartz and Feldspar with Iron Oxide cement)
sedimentary
Granite
Phaneritic Felsic Igneous Rock (Main minerals: SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
metamorphic
Yellow Quartzite Pebble
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst Geode/Cluster
Quartz (SiO2) - variety Amethyst
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Sandstone Geode (Unbroken)
Siliciclastic sedimentary rock (primarily Quartz)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Oyster Shell (Aragonite/Calcite)
Calcium Carbonate (CaCO3)
sedimentary
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Rose Quartz
Rose Quartz (SiO2)
Mineral
Quartz
Quartz (SiO2)
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
Pyrite
Iron Pyrite (FeS₂)
Mineral
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Granite Cobble
Phaneritic Plutonic Felsic Rock
igneous
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Mica Schist
Foliated Metamorphic Rock (rich in Muscovite or Biotite)
metamorphic
Limonite (Iron Ore)
Limonite (an FeO(OH)·nH2O mineraloid, not a true mineral due to variable composition)
Mineral
Epidote with Quartz and Feldspar
Ca2(Al2,Fe3+)(SiO4)3(OH) (Epidote complex)
metamorphic
Seraphinite
Clinochlore (a variety of the chlorite group)
mineral
Quartz Druzy Geode
Silicon Dioxide (SiO2) - Crystalline Variety
mineral
Jasper with Quartz inclusion
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Limonite (Iron Ore/Hydrated Iron Oxide)
Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))
Mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Amethyst
Amethyst (SiO₂)
Mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Schorl (Black Tourmaline) in Quartz or Feldspar Matrix
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite
igneous