Native Sulfur
Sulfur (S)
Category
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Native Sulfur
Sulfur (S)
Quartz Sand Grain
Silicon Dioxide (SiO2)
Beach Pebble (likely Quartz or Chalcedony)
Silicon Dioxide (SiO2)
Rose Quartz Beads
SiO2 (Silicon Dioxide with trace inclusions of Ti, Fe, or Mn)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Diamond (set in jewelry)
Diamond (Carbon, C)
Rough Quartz
Quartz (Silicon Dioxide, SiO2)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
Rough Green Tourmaline (Verdelite)
Elbaite (Complex Borosilicate), Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
Black Tourmaline (Schorl)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe2+3Al6Si6O18(BO3)3(OH)3OH
Quartz Pebble
Silicon Dioxide (SiO2)
Crazy Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Banded Agate (Lake Superior Agate type)
Agate (Cryptocrystalline Variety of Quartz, SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Blue Chalcedony
Silicon Dioxide (SiO2)
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Orange Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Milky Quartz
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Fluorite (Purple/Blue variety)
Calcium Fluoride (CaF2)
Clear Quartz Crystal (Herkimer Diamond style)
Silicon Dioxide (SiO2)
Agate (Thunderegg segment)
Silicon dioxide (SiO2) - Microcrystalline Quartz/Chalcedony
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
Pyrite
Iron Disulfide (FeS2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geodic structure
Red Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Rough Amethyst
Silicon Dioxide (SiO2) with Iron impurities
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
Cinnabar in Quartz
Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)
Quartz Druse (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
White Quartz Pebble
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Milky Quartz (Tumbled Pebble)
Silicon Dioxide (SiO2)