Mineral, Possibly Rock Fragment Containing A Mineral

Weathered feldspar-rich rock, possibly amazonite-bearing granite

Likely granite or pegmatite containing microcline feldspar (KAlSi₃O₈), with quartz and altered minerals

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Breccia Pebble

Sedimentary Breccia

Dark granite or granitic gneiss slab

Quartz–feldspar–biotite granite; possibly foliated granitic gneiss

Fossiliferous limestone, likely coral or shell fragment

Calcitic limestone (primarily CaCO₃), containing preserved marine bioclasts

Weathered limestone fragment, possibly fossiliferous

Calcite-rich limestone (CaCO₃), possibly bioclastic limestone

Fossiliferous limestone

Calcite-rich limestone (primarily CaCO₃), possibly containing fossil shell or coral fragments

Greenstone (likely serpentinite or altered basalt)

Serpentinite, chiefly serpentine-group minerals; possibly chlorite- or actinolite-bearing greenschist

Blue-gray quartz-rich rock, possibly blue aventurine or sodalite-bearing stone

Probable quartz–feldspar aggregate; exact identification requires testing

Weathered granite or granitic pegmatite fragment

Granite; chiefly quartz (SiO₂), feldspar, and mica, possibly iron-oxide alteration

Quartz Geode / Druzy Quartz

Silicon Dioxide (SiO2)

Weathered iron-rich rock fragment

Likely limonite/goethite-rich ironstone; exact identification requires testing

Conglomerate

Conglomerate rock

Small quartz-rich stone, possibly granite fragment

Indeterminate; likely quartz (SiO₂) with feldspar and/or mica

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Blue sodalite-bearing rock, possibly lapis lazuli

Sodalite (Na₈Al₆Si₆O₂₄Cl₂), likely in a feldspathoid-rich aggregate

Quartz-rich rock fragment, possibly milky quartz or quartzite

Quartz (SiO₂), likely with minor iron-oxide or feldspar staining

Rounded pebble, likely mixed lithology

Lithology uncertain; possibly a fine-grained metamorphic or volcanic rock with a quartz-rich/pink feldspar vein or inclusion

Weathered fossil fragment, possibly bone

Indeterminate fossilized bone; likely mineralized vertebrate bone (apatite-rich)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Porphyritic Basalt or Lamprophyre

Extrusive igneous rock with visible phenocrysts

Weathered iron-rich rock fragment

Likely limonite/goethite-bearing rock, possibly altered pyrite or mica schist

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Small polished or naturally worn stone, possibly quartz-bearing rock

Indeterminate from the blurred image; likely quartz (SiO₂) or a pale feldspar-rich fragment

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite if metamorphically recrystallized

Quartz-rich rock, possibly iron-stained quartz or quartzite

Quartz (SiO₂), potentially quartzite with iron-oxide staining

Quartz-rich pebble, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide or feldspar impurities

Likely milky quartz fragment

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide or mica inclusions

Weathered iron-rich stone, possibly limonite-bearing rock

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

Quartz-rich rock, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly a quartzite fragment

Iron-rich weathered stone, possibly limonite/goethite

Limonite (mixture of hydrated iron oxides), commonly goethite (α-FeO(OH))

Likely quartz-rich rock fragment

Quartz (silicon dioxide, SiO₂), possibly in a granitic or pegmatitic matrix

Sandstone

Arenite

Ocean Jasper

Orbicular Jasper / Silicate

Small blue-green mineral or stone bead

Unidentified opaque blue-green mineral; the image is insufficient for reliable species identification

Black Beauty Meteorite

NWA 7034 (Northwest Africa 7034)

Reddish-brown crystalline rock, possibly weathered granite or garnet-bearing schist

Indeterminate; likely quartz–feldspar–mica rock with iron oxides, potentially garnet-bearing

Granite (likely weathered, coarse-grained granite)

Granite, composed mainly of quartz, feldspar, and mica

Ironstone Concretion

Siderite or Hematite Concretion

Black basalt (likely polished or cut fragment)

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, clinopyroxene, and often olivine or magnetite

Milky quartz vein fragment (likely quartz with minor feldspar/mica)

Quartz, SiO₂; possibly associated feldspar and mica

Fossilized shell or small fossil fragment

Indeterminate fossil; possibly a partial gastropod or bivalve, mineralized with calcite