Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Learn about Mineral (Synthetic Paper And Ink Polymorph) in the encyclopedia
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Carved Gemstone Mushroom
Quartz / Feldspar composite (Carved lapidary art)
gemstone
Beach Pebble (Basalt / Greywacke)
Basalt (or fine-grained Sedimentary Greywacke)
igneous
Quartz (Milky or Cloudy)
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
igneous
Basalt
Extrusive Igneous Rock
igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
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
Orange Calcite (likely polished specimen)
Calcite
Mineral
Asphalt Chunk
Asphalt concrete
man-made composite
K-Feldspar (Potassium Feldspar)
Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Chert / Flint
Cryptocrystalline quartz (SiO2)
Sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Emerald (or possibly Green Glass / Slag)
Beryl (Be3Al2(SiO3)6)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limonite
FeO(OH)·nH2O
mineral
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Quartz Vein in Basalt or Mafic Rock
Silicon Dioxide (SiO2) vein in volcanic/mafic matrix
igneous
Blue Aventurine
Quartz (SiO2) with inclusions
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Chalcedony / Agate Nodule
Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Copper Ore (Malachite and Limonite bearing)
Cuprite, Malachite, and Limonite mixture
mineral
Green Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8Al6Si6O24Cl2
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite / Iron-Rich Basalt
Magnetite bearing Mafic Rock (Fe3O4)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral