Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Category
Man Made Byproduct (Often Mistaken For Obsidian Or Emerald)
Browse man made byproduct (often mistaken for obsidian or emerald) specimens identified by the Rock Identifier community.
Learn about Man Made Byproduct (Often Mistaken For Obsidian Or Emerald) in the encyclopedia
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Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Quartz
Quartz (SiO₂)
Mineral
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Green glassy cabochon, likely dyed or synthetic material
Uncertain; possibly green obsidian, chrysoprase, or synthetic glass
gemstone
Polished jasper pebble
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with possible iron-oxide and other mineral inclusions
mineral
Serpentine
Serpentine subgroup (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Unidentified polished dark gemstone cabochon
Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification
gemstone
Geodude
Geodude (Rock Pokémon: No. 74)
igneous
Scoria (Basaltic Lava Rock)
Vesicular Basalt
igneous
Black Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow chalcedony (likely agate) cabochons
Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed
gemstone
Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Jasper with Dendritic Inclusions
Microcrystalline Quartz (SiO2) with manganese or iron oxide inclusions
sedimentary
Likely rough pyrite specimen
Pyrite (FeS₂)
mineral
Quartzite with Dendritic Manganese Oxide Inclusions
Metamorphic Quartzite (SiO2 with Mn-oxides)
metamorphic
Yellow Jasper with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Likely vesicular basalt (scoria)
Basaltic scoria; chiefly plagioclase, pyroxene, and olivine with volcanic glass
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Apache Tear (Obsidian)
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Ironstone Concretion
Limonitic/Hematitic Concretion
sedimentary
Malachite-bearing copper ore
Malachite, Cu₂CO₃(OH)₂, likely mixed with chrysocolla, copper minerals, and iron oxides
mineral
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
igneous
Eclogite
Eclogite (Omphacite + Almandine-Pyrope Garnet)
metamorphic
Turquoise
Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)
Mineral