Man Made Material (Jewelry, Metal Alloy)

Tumbled green-and-white stone, likely serpentine

Serpentinite; mainly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnesite or talc

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant

Pink quartz-rich stone, likely rose quartz

Rose quartz; quartz, SiO₂, commonly colored by trace elements and microscopic inclusions

Carnelian Agate

Silicon Dioxide (SiO2) - Chalcedony with Iron Oxide impurities

Chert / Jasper

Silicon Dioxide (SiO2)

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Rough turquoise-bearing rock (probable turquoise matrix)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a host-rock matrix

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Fossil Shark Tooth

Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)

Chert (variations include Flint or Jasper)

Silicon Dioxide (SiO2)

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Chondrite Meteorite

Ordinary Chondrite (S-type Asteroid fragment)

Chrysocolla in Quartz

Hydrated copper phyllosilicate with silicon dioxide (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O + SiO2)

Weathered limestone or calcareous fossil fragment

Calcite-rich carbonate rock (CaCO₃), possibly fossiliferous limestone

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

Quartz-rich gravel fragment

Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Faceted)

Silicon dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Kyanite

Kyanite (Al2SiO5)

Jasper

Microcrystalline Quartz (SiO2)

Tumbled blue-gray stone beads, likely labradorite or dyed quartz

Probable labradorite (plagioclase feldspar; approximately NaAlSi₃O₈–CaAl₂Si₂O₈), though exact identification requires testing

Greisen

Greisen

Jasper

Microcrystalline Quartz (SiO2)

Lapis Lazuli

Lapis Lazuli (Complex silicate mixture including Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Dark gray basalt or andesite cobble

Fine-grained mafic to intermediate volcanic rock; commonly plagioclase feldspar, pyroxene, and possibly olivine

Granite Pebble

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Diamond

Diamond (pure carbon, C)

Rounded quartz-rich pebble

Likely milky quartz or quartzite (SiO₂)

Yellow Chalcedony (likely Carnelian or Yellow Agate)

Silicon Dioxide (SiO2)

Muscovite mica

Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂

Likely tumbled quartz/chalcedony

Quartz (SiO₂), possibly milky quartz or pale chalcedony

Lemon Quartz

Silicon Dioxide (SiO2)

Diamond

C

Amygdaloidal Basalt

Basalt with secondary mineral infillings (SiO2, (Ca,Na)2-3(Mg,Fe,Al)5Si8O22(OH)2)

Jasper

Silicon dioxide (Quartz variety), SiO2

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)