Synthetic (Ceramic)

Lepidolite

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

Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).

Galena (PbS)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Weathered iron-rich quartzite or ironstone cobble

Quartzite, likely limonite/goethite-stained (SiO₂ with FeO(OH)·nH₂O)

Polished ocean jasper (orbicular jasper), probable

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral inclusions

Limonite (often after Hematite or Goethite)

Limonite (FeO(OH)·nH2O)

Opalite

Synthetic Glass (SiO2 + impurities)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Lepidolite

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

Chert Nodules (with Quartz Inclusions)

Microcrystalline Quartz (SiO2)

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)

Diamond (or Clear Quartz / Cubic Zirconia)

Carbon (C) or Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

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)

Opalite

Synthetic glass / Opalized glass

Opalite

Synthetic Glass (Simulated Opal)

Opalite Egg

Synthetic Glass (Simulated Opal)

Opalite

Synthetic Glass (Simulated Opal)

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Opalite

Synthetic Silicon Dioxide (SiO2)

Opalite

Synthetic Glass (Silica-based)

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Opalite

Synthetic Glass (Simulated Opal)

Travertine (Ceramic Tile)

Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)

BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial dyes

Note: The image provided is a fabric sock, not a geological specimen.

Polyester-Cotton Blend with Elastane

Diamond (or Cubic Zirconia)

Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)