Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
Learn about Mineral (Specifically A Mineraloid) in the encyclopedia
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Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
Not a geological specimen
N/A (man-made object)
N/A
Sodalite
Na8Al6Si6O24Cl2
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite / Iron-Rich Basalt
Magnetite bearing Mafic Rock (Fe3O4)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Kfeldspar (Potassium Feldspar)
KAlSi3O8
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Olivine (Peridot)
Basalt containing (Mg,Fe)2SiO4
igneous
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Polished dark stone, likely basalt
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Cloudy Quartz (or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Orange Calcite
Calcite (CaCO3)
Mineral
Granite Pebble
Granite (Felsic intrusive igneous rock)
igneous
Magnetite / Hematite rich ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Asphalt Chunk
Asphalt concrete
man-made composite
Green Quartz
Silicon Dioxide (SiO2)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Amazonite
Microcline (KAlSi3O8)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Lepidolite in Quartz
K(Li,Al)3(Si,Al)4O10(F,OH)2 / SiO2
mineral