Goethite
Goethite (FeO(OH))
mineral
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Granite
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Matrix
igneous/metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Yellow Diamond (Faceted)
Diamond (C - Pure Carbon)
mineral
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Rhodochrosite (Beads) and Citrine (Pendant)
Rhodochrosite (MnCO3) and Quartz variety Citrine (SiO2)
mineral
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Mineral
Quartzite
Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Magnetite / Iron-Rich Concretion
Magnetite (Fe3O4) or Bog Iron Limonite
mineral
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Cubic Zirconia
Zirconium dioxide (ZrO2)
mineralogical simulant / gemstone
Scoria
Vesicular Basaltic Glass
igneous
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Basalt
Extrusive mafic igneous rock
igneous
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
sedimentary (geologically classified as a variety of chalcedony/quartz)
Turquoise, Pearl, and Coral Necklace
CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Gold
Native Gold (Au)
mineral
Yellow Jade
Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Red Tiger's Eye beads
Tiger's Eye (variety of Chalcedony, SiO2)
Mineral / Gemstone (variety of Quartz)
Goethite
Goethite (FeO(OH))
mineral
Diamond (in Matrix)
Carbon (C)
mineral
Jasper (likely a variety of Brecciated Jasper or a patterned variety)
Silicon dioxide (SiO2)
Mineral
Diamond (Cut Gemstones in Jewelry)
Carbon (C)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Aventurine
Aventurine (Silicon Dioxide with Fuchsite inclusions) - SiO2
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Chromite
Chromite (FeCr2O4)
mineral
Malachite and Azurite on Matrix
Cu2CO3(OH)2 (Malachite) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous