Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Iron Meteorite
Siderite (Iron-Nickel Alloy)
meteorite
Likely basaltic rock fragment
Fine-grained mafic igneous rock, probably basalt (plagioclase–pyroxene ± olivine)
igneous
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid
Chert (Iron-Stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Jasper with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
mineral
White Topaz
Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2
mineral
Chondrite Meteorite
Undifferentiated Chondrite
meteorite
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Sulfur
Native Sulfur (S)
mineral
Jasper with Dendritic Inclusions
Microcrystalline Quartz (SiO2) with manganese or iron oxide inclusions
sedimentary
Vesicular Basalt (commonly mistaken for Slag)
Scoriaceous Basalt (composed primarily of Plagioclase Feldspar and Pyroxene)
igneous
Iron meteorite fragment
Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment
meteorite
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Iron-Nickel Meteorite Fragment (Unclassified)
Iron-Nickel Alloy (Taenite and Kamacite)
meteorite
Unopened Geode
Geode (containing various mineralization like Quartz SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Anthracite Coal with Sulfur staining
Anthracite (Carbon C with impurities)
metamorphic
Unidentified weathered rock fragments
Likely mixed silicate rocks; specific identification requires testing
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Iron-rich meteorite candidate
Undetermined meteoritic iron–nickel material; possibly an ordinary chondrite or weathered iron meteorite
meteorite
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Amazonite
Amazonite (KAlSi3O8) - a variety of Microcline Feldspar
Mineral
Pallasite Meteorite
Pallasite (ST-class)
mineral
Tektite
Natural impact glass
meteorite
Osumilite in Granite Matrix
(K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30
mineral
Sandstone Concretion
Sedimentary Concretion (SiO2 or CaCO3 cemented)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Scoria
Scoriaceous Basalt
igneous
Dendritic Opal (Merlinite)
Hydrated Silica with Manganese/Iron oxide inclusions (SiO2·nH2O)
mineral
Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
igneous
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with impurities
mineral
Dalmatian Stone
Peralkaline Quartz-Feldspar Rock
igneous
Dendritic Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Quartzite with inclusions
Quartzite (SiO2)
metamorphic