Agate
Silicon Dioxide (Chalcedony), SiO2
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (Chalcedony), SiO2
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
Sulfur on Aragonite
Sulfur (S) on Aragonite (CaCO3)
Psilomelane (Black Hematite varietal)
Barium Manganese Oxide (Ba,H2O)2Mn5O10
Quartz
Silicon dioxide (SiO2)
Turtleback Rock (Brecciated Diabase / Granite)
Brecciated hypabyssal intrusive rock
Moonstone
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
Celestine (Celestite)
Celestine (Strontium Sulfate, SrSO4)
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Epidote in Matrix (Dragon Stone variant)
Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Greenstone
Greenschist-facies basaltic rock
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Granite
Granite (Felsic Plutonic Rock)
Milky Quartz
Silicon Dioxide (SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)
Greenstone (Greywacke or Nephrite Jade variant)
Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)
Poppy Jasper
Silicon Dioxide (SiO2) with Hematite and Iron Oxide inclusions
Obsidian
Volcanic Glass (Silicon Dioxide with impurities)
Basalt River Stone
Basalt (Aphanitic Mafic Igneous Rock)
Pegmatite
Igneous Pegmatite (felsic intrusive rock)
Tumbled blue glassy mineral, possibly sodalite or blue aventurine
Identification uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue-dyed quartz/slag-like material
Jasper
Microcrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Sunstone
Oligoclase (a variety of Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8
Greenstone
Greenschist (metamorphosed mafic igneous rock)
Glauconitic Sandstone
Glauconitic Sandstone (complex silicate formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
Bloodstone
Chalcedony (Variety: Bloodstone / Heliotrope), SiO2
Fluorite
Calcium Fluoride (CaF2)
Pink Opal
Hydrated Silica (SiO2·nH2O)
Jasper
Silicon Dioxide (SiO2) with impurities
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
Bornite (Peacock Ore) / Acid-treated Chalcopyrite
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Native Gold (in the form of jewelry)
Gold (Au)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Gold Flake
Native Gold (Au)