Meteorite

Iron Meteorite Fragment

Siderite (Geological term for iron meteorite class - Fe/Ni alloy)

Weathered iron-rich rock, possibly meteorite

Uncertain; likely goethite/hematite-rich material, with meteorite possibility

Possible basaltic volcanic rock or iron-rich meteorite

Likely basalt (plagioclase–pyroxene rock); meteorite status cannot be confirmed visually

Brown weathered river pebble

Indeterminate lithology; likely ferruginous sandstone, mudstone, or weathered volcanic rock

Tumbled or cut iron-rich mineral specimen

Likely limonite/goethite (hydrated iron oxides), possibly weathered hematite

Chondrite Meteorite Fragment

Ordinary Chondrite (L or H type)

Micro-Meteorite (Micrometeoroid)

Extraterrestrial Spherule (Silicate or Iron-Nickel)

Iron Meteorite (Candidate)

Siderite (Meteoric Iron)

Gossanous Sandstone (likely Terrestrial)

Arenite with Iron-Oxide inclusions

Iron Slag

Iron Slag (Industrial Vitreous Material)

Rounded brown pebble, likely weathered sandstone or iron-stained quartzite

Probable quartz-rich sandstone (SiO₂-dominated); exact identification requires testing

Ironstone concretion (probable hematite–goethite-rich ironstone)

Iron oxide/hydroxide concretion; chiefly hematite (Fe₂O₃) and goethite (FeO(OH)), with possible magnetite and quartz

Gold Nugget

Native Gold (Au)

Small metallic-looking mineral/rock fragment

Indeterminate from image; possible pyrite-bearing sulfide rock or native-metal/meteorite fragment

Polished tektite (likely indochinite)

Impact glass; natural silica-rich glass, approximately SiO₂ 70–80%

Iron-rich concretion or weathered ironstone

Limonite/goethite-rich ironstone; commonly hydrated iron oxides, chiefly FeO(OH)·nH₂O

Weathered vesicular limestone or calcareous tuff

Porous calcite-rich carbonate rock; composition likely predominantly CaCO₃ (calcite), with iron-oxide staining and possible silica/clay impurities

Iron-rich concretion or weathered ironstone

Goethite–hematite-bearing ferruginous concretion; exact identification requires testing

Weathered iron-rich stone, possibly limonite-bearing rock

Limonite/goethite mixture (hydrated iron oxides), identification uncertain from image

Weathered iron-rich rock, possibly basalt or ironstone

Likely vesicular basalt or ferruginous breccia; exact identification requires testing

Vesicular iron-rich slag or weathered metallic ore

Indeterminate; likely Fe-oxide-bearing slag (magnetite/hematite) rather than a specific natural mineral

Ironstone Concretion / Goethite Nodules

Ironstone (composed primarily of Goethite FeO(OH) and Limonite)

Peridot (Olivine)

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Asphalt fragment

Bituminous concrete

Peridot

Olivine (Mg, Fe)2SiO4

Small brown pebble or mineral fragment

Indeterminate from image; possibly iron-stained quartz, ironstone, or a dark mineral grain

Weathered iron-rich sandstone or lateritic rock

Ferruginous sandstone, primarily quartz (SiO₂) with iron oxides such as hematite/goethite

Weathered iron-rich sandstone or ferruginous conglomerate

Quartz-rich sandstone cemented by iron oxides/hydroxides (primarily hematite and goethite)

Native Gold Nugget

Native Gold (Au)

Polished vesicular basalt (likely scoriaceous basalt)

Basalt, aphanitic mafic volcanic rock; chiefly plagioclase, pyroxene, and iron-rich oxides

Rounded iron-rich cobble (likely lateritic sandstone or ironstone)

Ferruginous sandstone/ironstone; chiefly quartz (SiO₂) with iron oxides, especially hematite (Fe₂O₃) and goethite (FeO(OH))

Vesicular basalt (scoriaceous basalt) with secondary minerals

Basalt, predominantly plagioclase–pyroxene–olivine; surface cavities may contain zeolites or calcite

Likely iron-rich rock or meteorite fragment

Indeterminate; possible hematite-/magnetite-bearing material

Possible basaltic rock or meteorite candidate

Likely vesicular basalt; meteorite identification cannot be confirmed visually

Libyan Desert Glass

Impactite (High-silica tektite)

Tektite (Indochinite)

Tektite (Natural Glass, SiO2 + Al2O3)

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2 + tracing minerals

Tektite (Indochinite)

Tektite (natural glass, SiO2 + Al2O3)

Unidentified weathered mineral/rock fragment

Indeterminate; likely a weathered iron-rich silicate or sulfide-bearing specimen

Likely weathered basalt or iron-rich volcanic rock

Basalt; primarily plagioclase feldspar, pyroxene, and possibly olivine with iron-oxide alteration

Tektite (Indochinite)

Tektite (High-silica impact glass)

Tektite (Indochinite)

Tektite - High-silica amorphous glass (SiO2 + Al2O3)