Anthropogenic Material

Rose Quartz

Quartz (Silicon dioxide, SiO2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Fossilized Bone Fragment

Vertebrate Fossil

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Polished septarian nodule (likely)

Septarian calcite–aragonite nodule with iron-oxide-rich matrix

Weathered greenstone / serpentinite (probable)

Serpentinite, chiefly antigorite–lizardite Mg₃Si₂O₅(OH)₄; possibly altered mafic greenstone

Likely weathered garnet-bearing metamorphic rock

Probable garnet schist or garnet amphibolite; garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)

Tumbled iolite (water sapphire)

Iolite; cordierite, (Mg,Fe)₂Al₄Si₅O₁₈

Quartz-rich chalcedony (likely jasper or agate)

Microcrystalline quartz, SiO₂; fibrous chalcedony with iron-oxide inclusions

Chrysocolla-rich copper ore

Chrysocolla (hydrated copper aluminosilicate), likely with malachite and copper oxides

Serpentinite

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and talc

Possible weathered quartz-rich rock or iron-stained mineral fragment

Indeterminate; possibly quartz (SiO₂) with iron-oxide inclusions

Peridot

Olivine ((Mg,Fe)2SiO4)

Polished honey calcite point

Calcite (calcium carbonate, CaCO₃), likely honey/yellow calcite

Dyed turquoise-like gemstone beads

Likely turquoise (hydrous copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O), possibly dyed howlite or magnesite

Tumbled dark stone, possibly obsidian or basalt

Uncertain from the photograph; likely volcanic glass (obsidian, SiO₂) or fine-grained basalt

Polished serpentine

Serpentinite; mainly antigorite, lizardite, and chrysotile-group minerals

Likely weathered mica schist fragment

Mica schist, chiefly muscovite/biotite mica with quartz and feldspar

Green aventurine (likely)

Quartz variety; silicon dioxide (SiO₂), commonly colored by fuchsite mica or other inclusions

Reddish-brown iron-rich rock, possibly weathered basalt or laterite

Indeterminate; likely iron-oxide-stained basalt (plagioclase–pyroxene) or ferruginous laterite (goethite/hematite)

Tumbled amethyst

Amethyst, purple quartz (SiO₂), colored by trace iron and irradiation

Tumbled amethyst

Quartz, crystalline silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement)

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Milky Quartz

Silicon Dioxide (SiO2)

Ocean Jasper

Orbicular Jasper, Chalcedony (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Quartzite or Quartz Vein Material

SiO2

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Raw Quartz

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Yellow-orange quartz (likely citrine or iron-stained quartz)

Quartz, silicon dioxide (SiO₂), colored by iron impurities or irradiation

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Amber (Green variation)

Succinite

Diamond (Emerald Cut)

Carbon (C)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Petrified Wood

Silicified Wood (SiO2)