Synthetic (Ceramic)

Tumbled white quartz or quartzite pebble

Quartz (SiO₂), possibly massive quartzite

Iridescent polished gemstone, likely opal

Common or precious opal (hydrated amorphous silica, SiO₂·nH₂O), possibly synthetic or glass imitation

Ruby

Corundum (Al2O3)

Small weathered rock fragment

Indeterminate; possibly granitic or altered feldspathic material

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

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

Pyrite

Iron Sulfide (FeS2)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled quartz

Quartz, silicon dioxide (SiO₂)

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Tumbled pink feldspar-rich stone

Likely microcline feldspar (KAlSi₃O₈), possibly granite or quartz-feldspar pegmatite

Chert Nodules (with Quartz Inclusions)

Microcrystalline Quartz (SiO2)

Lepidolite

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

Lepidolite

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

Chert (Black Flint)

Silicon Dioxide (SiO2)

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Lepidolite

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

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Possible iron-rich meteorite fragment

Undetermined; possibly an iron meteorite or stony-iron meteorite

Likely tumbled white quartz or quartzite pebble

Quartz (SiO₂), possibly quartzite

Pink-and-white quartz-rich rock, likely rose quartz-bearing granite or pegmatite

Quartz (SiO₂) with pink feldspar, likely granitic pegmatite

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Diamond

Natural Diamond (Carbon, C)

Diamond (Cut Gemstone)

Carbon (C)

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Red faceted gemstone, likely synthetic ruby or red glass

Ruby: corundum, aluminum oxide (Al₂O₃), chromium-colored; identity cannot be confirmed visually

Synthetic Sapphire and Ion-X Glass

Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass

Ruby (or potential synthetic/imitation)

Corundum (Al2O3)

Likely tumbled hematite-rich ironstone

Hematite, Fe₂O₃, possibly mixed with goethite or magnetite

Iron-stained quartz or chert fragment

Quartz (SiO₂), possibly microcrystalline quartz/chert with limonite staining

Ironstone concretion with iron-oxide/possibly hematite inclusions

Ferruginous sandstone or lateritic ironstone; inclusions likely hematite (Fe₂O₃) and/or goethite (FeO(OH))

Polished jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Weathered iron-rich rock (probable laterite or limonite-bearing stone)

Goethite–limonite mixture, commonly written FeO(OH)·nH₂O, with possible quartz and clay minerals

Earthy Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)