Man Made Material (Anthro Lithic Product)

Iron-rich meteorite candidate

Undetermined meteoritic iron–nickel material; possibly an ordinary chondrite or weathered iron meteorite

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Carved yellow stone butterfly

Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone

Possible weathered metal-rich rock or slag fragment

Uncertain; possibly iron-oxide-rich breccia or industrial slag

Unidentified gray stone/concrete-like fragment

Indeterminate; likely a fine-grained carbonate or cementitious geological fragment

Mica-rich metamorphic rock, likely phyllite or mica schist

Quartz–muscovite phyllite/schist; commonly dominated by muscovite mica, quartz, and minor feldspar

Likely blue kyanite

Kyanite, Al₂SiO₅

Raw ruby (corundum)

Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium

Quartz geode

Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity

Blue-green turquoise-like tumbled stone

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

Prehistoric worked flint/chert artifacts

Microcrystalline quartz (SiO₂), chiefly chalcedony or chert; possible fossil-bearing chert

Chert (and Chert Flake)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Malachite cabochon or polished bead

Malachite, Cu₂CO₃(OH)₂

Tumbled fossil shark tooth pendant

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image

Polymict breccia

Lithic breccia; clast-rich, iron-stained breccia

Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone

Iron oxides/hydroxides, chiefly limonite/goethite (FeO(OH)·nH₂O), with a probable silicate or clay matrix

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Polymictic conglomerate

Conglomerate; clast-supported polymictic conglomerate in a dark matrix

Tumbled feldspar-rich rock, likely pink-orange microcline or granite fragment

K-feldspar (microcline/orthoclase), approximately KAlSi₃O₈; exact identification requires testing

Small tumbled quartz-like pebble

Likely quartz (SiO₂), possibly iron-stained chalcedony or feldspar

Conglomerate (pebble-to-cobble gravel)

Polymictic conglomerate; clast-supported conglomerate in a sandy or silty matrix

Diamond

Native Carbon (C)

Botryoidal hematite (ironstone)

Hematite, α-Fe₂O₃, likely with goethite and iron-rich matrix

Lepidolite

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

Galena-bearing sulfide fragment

Galena (PbS), possibly with quartz or carbonate gangue

Zircon

Zirconium Silicate (ZrSiO₄)

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

Native American Hammerstone / Pitted Stone

Modified lithic artifact (often quartzite, basalt, or granite)

Tumbled black stone, likely basalt or black jasper

Probably basalt (fine-grained plagioclase–pyroxene rock); exact identification is uncertain from the image

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Diamond

Carbon (C)

Greenstone

Metabasalt / Metavolcanic rock

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Chert (Flint)

Silicon Dioxide (SiO2)

Chert

Chert (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Weathered brown quartz-rich rock, likely sandstone

Quartz-rich sandstone (indeterminate lithology)

Chert

Microcrystalline Quartz (SiO2)