Pink Quartz
Silicon Dioxide (SiO2)
mineral
Category
Man Made Object (Metal Alloy)
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
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Uncertain small metallic-looking mineral/rock fragment
Indeterminate; possibly galena-bearing rock or metallic slag
mineral
Iron-stained quartz-bearing rock
Quartz (SiO₂), likely in a limonite/goethite-rich matrix
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Iron Meteorite
Siderite (Fe-Ni alloy, primarily Kamacite and Taenite)
igneous
Metallic sulfide ore, likely galena-bearing rock
Galena (lead sulfide, PbS), possibly with pyrite or other sulfides
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, with varying amounts of Calcite, Pyrite, and Sodalite).
Mineral
Sandstone Concretion
Sedimentary Concretion (Quartz sand bound by mineral cement)
sedimentary
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Chert
Chert (Microcrystalline Quartz)
sedimentary
Diamond (Cut Gemstone)
Carbon (C)
gemstone
Basalt
Basalt (Mafic volcanic rock)
igneous
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Nephrite Jade
Tremolite-Actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Quartzite
Quartzite
Metamorphic rock
Jasper (yellow/cream variety)
SiO₂ (Cryptocrystalline Quartz)
Sedimentary
Green Aventurine
Quartz variety with fuchsite inclusions (SiO2)
mineral
Sandstone
Arenite (mostly SiO2)
sedimentary
Pearl
Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin
mineraloid
Galena-rich sulfide specimen
Galena (lead sulfide, PbS), possibly with sphalerite and oxidized sulfides
mineral
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Sandstone
Arenite (with iron oxide cement)
sedimentary
Aventurine
Quartz (Variety Aventurine), SiO2
mineral
Quartz Vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Pelitic or Shaly Matrix
metamorphic
Chalcedony Pebble (Carnelian / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Synthetic Convention Badge (Plastic/PVC)
Polyvinyl Chloride (PVC) / Polycarbonate
mineraloid (synthetic)
Diamond
Carbon (C)
gemstone
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Vesicular volcanic rock, likely weathered pumice or scoria
Pumice/scoria; predominantly volcanic glass and feldspar, with possible iron oxides
igneous
Sunstone (Aventurine Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Hematite Nodule / Concretion
Hematite (Fe2O3)
mineral