Mineral (Refined Metal)

Diamond ring

Diamond (crystalline carbon, C)

Pebble or Cobble (likely composed of sandstone or conglomerate)

Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)

Diamond

Diamond (C)

Pyrite with Calcite

Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Pyrite (“fool’s gold”)

Pyrite, FeS₂; cubic iron sulfide

Tumbled metallic sulfide mineral, likely pyrite

Pyrite (FeS₂), tentatively; possibly marcasite or a pyrite-rich nodule

Polished hematite bead (probable)

Hematite, Fe₂O₃

Likely iron-rich rock or metallic mineral fragment

Uncertain; possibly limonite/goethite-rich material or weathered iron meteorite fragment

Chert (Nodule)

Silicon Dioxide (SiO2)

Iron-oxide-stained sulfide-bearing rock, possibly pyrite-bearing schist

Likely quartz–mica schist or massive sulfide rock with pyrite (FeS₂) and limonite/goethite (FeO(OH)·nH₂O)

Slag Glass

Amorphous Silica Glass (with metal oxide inclusions)

Gossan (with Limonite/Hematite coating)

Ferruginous Gossan (Fe2O3·nH2O / Fe2O3)

Iron-Stained Quartz/Quartzite

Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)

Serpentinite

Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)

Ruby-set gold ring

Ruby (corundum), Al₂O₃ colored red by chromium; mounted in a gold alloy

Gossan (Iron Hat)

Limonitic Gossan (Fe2O3·nH2O)

Diamond engagement ring

Diamond, crystalline carbon (C)

Polished turquoise cabochon pendant

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Black tourmaline pendant

Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4

Iron-rich meteorite candidate (possibly stony-iron meteorite)

Unclassified meteoritic material; apparent Fe-Ni metal with silicate matrix

Turquoise-colored ring stone (possibly turquoise or imitation)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image

Likely copper-bearing rock (oxidized copper ore)

Unidentified copper minerals, possibly malachite and cuprite; the image is insufficient for a precise identification

Honey Calcite (Yellow Calcite)

Calcium Carbonate (CaCO3)

Polished labradorite cabochon

Labradorite, plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Pyrite

Iron Pyrite (FeS2)

Pyrite

Iron Sulfide (FeS2)

Biotite schist

Mica schist, composed mainly of biotite mica and quartz with feldspar and iron oxides

Gold Ore (in Quartz/Pyrite)

Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)

Quartz Vein in Schist

Quartz (SiO2) in Pelitic Schist

Iron-rich meteorite candidate

Undetermined stony-iron or iron meteorite; possible weathered iron meteorite

Amethyst

Silicon dioxide (SiO2) with iron impurities

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Turquoise cabochon jewelry

Turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Granite

Phaneritic Plutonic Igneous Rock (Rich in SiO2)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Vesicular basalt (likely weathered volcanic rock)

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine

Blue-green glassy mineral specimen, possibly chalcedony or slag glass

Uncertain; candidate minerals include chrysocolla-bearing chalcedony or copper-bearing glassy slag

Red Granite

Intrusive Igneous Rock (Felsic)

Granite Pebble

Granite (composition of Quartz, Alkali Feldspar, and Plagioclase)

Blue aventurine or dyed blue quartzite pendant

Quartz (SiO₂), likely aventurine quartz/quartzite; exact identification requires testing