Pallasite Meteorite
Pallasite (Stony-Iron Meteorite)
meteorite
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
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Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Blue Chalcedony
Chalcedony (Silicon Dioxide, SiO2)
mineral
Lapis Lazuli
Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
Metamorphic rock
Granite
Phaneritic Felsic Igneous Rock
igneous
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Basalt
Basalt (containing plagioclase, pyroxene, and olivine)
igneous
Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)
Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)
metamorphic
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Sand Tiger Shark Tooth (Fossil)
Carcharias taurus (fossilized dentin/enameloid)
fossil
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Crinoid Columnal Fossil in Chert
Crinoidea stemming section in Microcrystalline Quartz (SiO2)
fossil
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Diabase (Dolerite)
Diabase or Dolerite
igneous
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions
mineral
Diorite
Phaneritic Intrusive Igneous Rock (composed of Plagioclase feldspar, Hornblende, and Biotite)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Silver (Jewelry form)
Native Silver (Ag)
mineral
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Diorite
Diorite (Plagioclase feldspar and amphibole/biotite)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Greenstone
Metamorphic mafic rock (chlorite-actinolite-epidote schist)
metamorphic
Malachite
Malachite (Cu2CO3(OH)2)
mineral
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
igneous
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
mineral
Rough Diamond
Diamond (pure Carbon, C)
mineral
Amethyst (Tumbled Cabinet Stone)
Silicon Dioxide (SiO2) with iron impurities
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Pink Granite
Intrusive Igneous Rock (high K-feldspar content)
igneous
Granite
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Diamond
Native Carbon (C)
mineral
Brecciated jasper (likely red-and-cream jasper)
Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining
gemstone
Blue calcite sphere
Calcite (CaCO₃), commonly blue-calcite variety
mineral
Pearl-and-gemstone insect brooch
Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image
gemstone
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Petoskey Stone
Favosites alpenensis
fossil