Ruby
Corundum (Al2O3 with Chromium traces)
Category
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
Ruby
Corundum (Al2O3 with Chromium traces)
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Agate
Agate (Silicon Dioxide - SiO2)
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Quartz / Quartzite
Silicon Dioxide (SiO2)
Moonstone
Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.
Fancy Jasper
Silicon Dioxide (SiO2) with impurities
Jasper
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Citrine Quartz
SiO2 (Silicon Dioxide with Iron impurities)
Milky Quartz
Silicon Dioxide (SiO2)
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
Charoite
Charoite (Hydrated potassium, sodium, calcium, barium, strontium silicate hydroxide fluoride)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Onyx
Chalcedony (SiO2) with parallel banding
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Sandstone
Sandstone (clastic sedimentary rock)
Milky Quartz
Silicon Dioxide (SiO2)
Flower Agate (Cherry Blossom Agate)
Chalcedony (Silicon Dioxide) with Opaque Inclusions - SiO2
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
Basalt with Iron Oxidation
Amygdaloidal Basalt (silicate rock primarily plagioclase, pyroxene, and olivine)
Specular Hematite with Quartz
Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)
Green Aventurine
Aventurine (variety of Quartz - SiO2)
Chalcedony in Matrix
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
Jasper with Chert
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Serpentine (Serpentinite)
Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)
Agate
Agate (Cryptocrystalline Variety of Quartz, SiO2)
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Agate
Silicon dioxide (SiO2)
Agate (Carnelian-Blue Agate mix)
Silicon Dioxide (SiO2)
Agate (Chalcedony Variation)
Silicon Dioxide (SiO2)
Agate (or Chalcedony)
Silicon Dioxide (SiO2)