Hematite
Iron(III) oxide (Fe2O3)
Category
Browse mineral (found in igneous and metamorphic rocks) specimens identified by the Rock Identifier community.
Hematite
Iron(III) oxide (Fe2O3)
Hematite
Iron(III) oxide (Fe2O3)
Tiny amber-colored crystal fragment
Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral
Smoky Quartz
Silicon Dioxide (SiO2)
Greenschist (or Serpentinite with Manganese Dendrites)
Greenschist facies metamorphic rock
Amazonite
Microcline (KAlSi3O8) with lead impurities
Green Tourmaline (Verdelite)
Schorl-Elbaite series (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
White tumbled stone, likely quartz or calcite
Indeterminate; possibly quartz (SiO₂) or calcite (CaCO₃)
Gneiss
Gneiss
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
Agate
Silicon Dioxide (Chalcedony), SiO2
Milky Quartz
Silicon Dioxide (SiO2)
Amethyst (Quartz variety)
Amethyst [Silicon Dioxide (SiO2)]
Emerald (Beryl)
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Optical Calcite
CaCO3 (Calcium Carbonate)
Agate
Silicon Dioxide (Chalcedony), SiO2
Iolite (Cordierite)
Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18
Clear Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
Aquamarine
Beryl (Be3Al2Si6O18)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Milky Quartz
Silicon Dioxide (SiO2)
Blue Sapphire
Corundum (Al2O3)
Clear Quartz Fragment
Quartz (Silicon Dioxide, SiO2)
Aventurine (Green Quartz)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)
Smoky Quartz
Silicon Dioxide (SiO2)
Banded Agate (specifically Lace Agate type)
Silicon Dioxide (SiO2)
Quartz (Clear Quartz / Rock Crystal)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
Quartz
Silicon Dioxide (SiO2)
Ruby (Corundum)
Al2O3 (Aluminium oxide with Chromium impurities)
K-Feldspar (Microcline / Orthoclase)
Potassium Feldspar (KAlSi3O8)
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
Quartz (Tumbled)
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2)