Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Category
Mineral (Evaporite)
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
Desert Rose
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O) or Barite (Barium Sulfate, BaSO4)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Shale
Shale (clastic sedimentary rock)
Sedimentary
Gold Mineral
Native Gold (Au)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Gneiss
Gneiss
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Desert Rose
Gypsum (CaSO4·2H2O) or Baryte (BaSO4) rosette
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Gneiss
Gneiss
metamorphic
Dendritic Quartz Pebble
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Pink Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
mineral
Desert Rose (Baryte/Gypsum Rosette)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Spinosaurus fossil (permineralized bone)
Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)
sedimentary
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Gneiss
Gneiss
metamorphic
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Fossil / Permineralized Bone
Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)
sedimentary
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Quartz on Schist
Silicon Dioxide (SiO2) on Foliated Metamorphic Rock
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Dendrite (Manganese Oxide Dendrites)
Psilomelane or Pyrolusite on Matrix (typically MnO2)
mineral
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
mineral
Desert Rose
Gypsum (variety Selenite) - CaSO4·2H2O
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic